Rank
Name
Country
County
Location
Maximum volume m3
[1]
Planning date
Completion date
26
Abberton
England
Essex
TL9810018300
51°49′41″N 0°52′24″E / 51.828181°N 0.873431°E / 51.828181; 0.873431 (Abberton Reservoir )
39,000,000
1935
[i]
1939
175
Agden
England
South Yorkshire
SK2610092300
53°25′37″N 1°36′31″W / 53.426850°N 1.6086803°W / 53.426850; -1.6086803 (Agden Reservoir )
2,859,000
1864
1869
152
Allerton Newton Fairburn
England
West Yorkshire
SE4500027200
53°44′21″N 1°19′09″W / 53.739250°N 1.3192470°W / 53.739250; -1.3192470 (Allerton Newton Fairburn )
3,347,500
NA
NA
229
Allt na Lairige
Scotland
Argyll and Bute
NN2530017400
56°19′00″N 4°49′34″W / 56.316700°N 4.8262144°W / 56.316700; -4.8262144 (Allt na Lairige )
1,838,000
1943
[ii]
1956
[iii]
83
Alton Water
England
Suffolk
TM1620035700
51°58′40″N 1°08′48″E / 51.977682°N 1.1465962°E / 51.977682; 1.1465962 (Alton Water )
9,100,000
1974
[iv]
1986
60
Alwen Reservoir
Wales
Conwy
SH9550053000
53°03′50″N 3°33′39″W / 53.063990°N 3.5609018°W / 53.063990; -3.5609018 (Alwen Reservoir )
14,754,000
1909
1921
135
Anglezarke
England
Lancashire
SD6170016000
53°38′21″N 2°34′51″W / 53.639105°N 2.5807524°W / 53.639105; -2.5807524 (Anglezarke Reservoir )
4,044,000
1850
1857
129
Angram
England
North Yorkshire
SE0400076000
54°10′47″N 1°56′25″W / 54.179767°N 1.9402122°W / 54.179767; -1.9402122 (Angram Reservoir )
4,737,000
1904
1918
119
Ardingly
England
West Sussex
TQ3350028800
51°02′35″N 0°05′49″W / 51.043051°N 0.097062417°W / 51.043051; -0.097062417 (Ardingly Reservoir )
5,206,000
1974
[v]
1979
[v]
210
Ardleigh
England
Essex
TM0340028200
51°54′55″N 0°57′22″E / 51.915170°N 0.95606328°E / 51.915170; 0.95606328 (Ardleigh Reservoir )
2,109,000
1964
1979
143
Arlington
England
East Sussex
TQ5335207419
50°50′46″N 0°10′37″E / 50.845975°N 0.17691709°E / 50.845975; 0.17691709 (Arlington Reservoir )
3,545,800
1969
1971
185
Audenshaw No.1
England
Greater Manchester
SJ9170096700
53°28′01″N 2°07′35″W / 53.466973°N 2.1264940°W / 53.466973; -2.1264940 (Audenshaw No.1 )
2,590,000
1875
1882
234
Audenshaw No.2
England
Greater Manchester
SJ9140096200
53°27′45″N 2°07′52″W / 53.462474°N 2.1309991°W / 53.462474; -2.1309991 (Audenshaw No.2 )
1,745,000
1875
1882
183
Audenshaw No.3
England
Greater Manchester
SJ9110096700
53°28′01″N 2°08′08″W / 53.466963°N 2.1355320°W / 53.466963; -2.1355320 (Audenshaw No.3 )
2,680,000
1877
1882
201
Baddinsgill
[v]
Scotland
Scottish Borders
NT1286455787
55°47′15″N 3°23′28″W / 55.787507°N 3.3910944°W / 55.787507; -3.3910944 (Baddinsgill Reservoir )
2,250,000
1926
1828
144
Baitings
England
West Yorkshire
SE0100018900
53°40′00″N 1°59′11″W / 53.666580°N 1.9863413°W / 53.666580; -1.9863413 (Baitings Reservoir )
3,523,000
1929
[v]
1956
168
Bakethin
England
Northumberland
NY6430091300
55°12′53″N 2°33′45″W / 55.214639°N 2.5626151°W / 55.214639; -2.5626151 (Bakethin Reservoir )
2,960,000
1971
[vi]
1981
50
Balderhead
England
County Durham
NY9280018400
54°33′39″N 2°06′46″W / 54.560782°N 2.1128527°W / 54.560782; -2.1128527 (Balderhead Reservoir )
19,618,000
1959
[i]
1965
178
Banbury
England
Greater London
TQ3620091400
51°36′18″N 0°02′05″W / 51.604974°N 0.034668699°W / 51.604974; -0.034668699 (Banbury Reservoir )
2,779,000
1897
[iv]
1903
166
Banbury FSA
England
Greater London
TQ3620091400
51°36′18″N 0°02′05″W / 51.604974°N 0.034668699°W / 51.604974; -0.034668699 (Banbury FSA )
3,040,000
2001
2012
202
Barden Lower
England
North Yorkshire
SE0350056700
54°00′23″N 1°56′53″W / 54.006312°N 1.9480887°W / 54.006312; -1.9480887 (Barden Lower Reservoir )
2,240,000
1854
1873
209
Barden Upper
England
North Yorkshire
SE0120057800
54°00′58″N 1°58′59″W / 54.016208°N 1.9831770°W / 54.016208; -1.9831770 (Barden Upper Reservoir )
2,112,000
1854
1873
261
Barnacre North
England
Lancashire
SD5260047800
53°55′27″N 2°43′24″W / 53.924153°N 2.7232767°W / 53.924153; -2.7232767 (Barnacre North )
344,000
1861
[iv]
1878
264
Barnacre South
England
Lancashire
SD5260047600
53°55′20″N 2°43′24″W / 53.922355°N 2.7232456°W / 53.922355; -2.7232456 (Barnacre South )
248,000
1861
[iv]
1878
268
Barrow 1
England
Somerset
ST5360067200
51°24′07″N 2°40′06″W / 51.401921°N 2.6684067°W / 51.401921; -2.6684067 (Barrow 1 )
157,000
1846
[iv]
1850
265
Barrow 2
England
Somerset
ST5390067500
51°24′17″N 2°39′51″W / 51.404643°N 2.6641335°W / 51.404643; -2.6641335 (Barrow 2 )
245,000
1846
[iv]
1850
208
Barrow 3
England
Somerset
ST5430068000
51°24′33″N 2°39′30″W / 51.409171°N 2.6584480°W / 51.409171; -2.6584480 (Barrow 3 )
2,160,000
1846
[iv]
1850
191
Bartley
England
West Midlands County
SP0020081200
52°25′44″N 1°59′55″W / 52.428782°N 1.9984853°W / 52.428782; -1.9984853 (Bartley Reservoir )
2,400,000
1925
1930
267
Beacons Reservoir
Wales
Powys
SN9870018580
51°51′24″N 3°28′20″W / 51.856583°N 3.4722935°W / 51.856583; -3.4722935 (Beacons Reservoir )
160,000
1883
[iv]
1897
96
Beckingham FSA
England
Nottinghamshire
SK7950090500
53°24′19″N 0°48′20″W / 53.405341°N 0.80563022°W / 53.405341; -0.80563022 (Beckingham FSA )
7,000,000
1960
1960
224
Belmont
England
Blackburn with Darwen
SD6730016400
53°38′35″N 2°29′46″W / 53.643081°N 2.4960998°W / 53.643081; -2.4960998 (Belmont Reservoir )
1,886,000
1824
1826
206
Belvide
England
Staffordshire
SJ8650010200
52°41′22″N 2°12′04″W / 52.689316°N 2.2011613°W / 52.689316; -2.2011613 (Belvide Reservoir )
2,196,000
1825
[i]
1833
239
Ben Crom
Northern Ireland
County Down
SB4015582002
54°10′04″N 5°58′57″W / 54.167845°N 5.9825162°W / 54.167845; -5.9825162 (Ben Crom Reservoir )
1,700,000
1945
1957
32
Bewl Bridge
England
East Sussex
TQ6776832663
51°04′08″N 0°23′35″E / 51.068782°N 0.39313386°E / 51.068782; 0.39313386 (Bewl Bridge Reservoir )
31,400,000
1967
[vi]
1975
195
Blackbrook
England
Leicestershire
SK4580017500
52°45′11″N 1°19′22″W / 52.753180°N 1.3228607°W / 52.753180; -1.3228607 (Blackbrook Reservoir )
2,300,000
1901
1906
160
Blackmoorfoot
England
West Yorkshire
SE0990013000
53°36′48″N 1°51′07″W / 53.613459°N 1.8518301°W / 53.613459; -1.8518301 (Blackmoorfoot )
3,205,000
1869
1876
212
Blackton
England
County Durham
NY9440018600
54°33′45″N 2°05′17″W / 54.562600°N 2.0881146°W / 54.562600; -2.0881146 (Blackton Reservoir )
2,105,000
1876
[i]
1896
5
Blackwater
Scotland
Highland
NN2475160292
56°42′05″N 4°51′50″W / 56.701359°N 4.8639740°W / 56.701359; -4.8639740 (Blackwater Reservoir )
214,977,000
1904
1909
88
Blagdon (Bristol)
England
Somerset
ST5100060000
51°20′13″N 2°42′17″W / 51.336967°N 2.7047849°W / 51.336967; -2.7047849 (Blagdon Lake )
8,260,000
1888
[iv]
1904
52
Blithfield
England
Staffordshire
SK0600023500
52°48′32″N 1°54′45″W / 52.809016°N 1.9124313°W / 52.809016; -1.9124313 (Blithfield Reservoir )
18,200,000
1892
1953
248
Bosley
England
Cheshire
SJ9220065900
53°11′24″N 2°07′05″W / 53.190130°N 2.1181929°W / 53.190130; -2.1181929 (Bosley Reservoir )
1,224,000
1826
1931
196
Bottoms (Longdendale)
England
Derbyshire
SK0230097000
53°28′11″N 1°58′01″W / 53.469732°N 1.9668196°W / 53.469732; -1.9668196 (Bottoms Reservoir (Derbyshire) )
2,300,000
1848
1877
78
Bough Beech
England
Kent
TQ4940047700
51°12′32″N 0°08′15″E / 51.208972°N 0.13741063°E / 51.208972; 0.13741063 (Bough Beech Reservoir )
10,018,000
1965
[vi]
1968
220
Branston Island
England
Lincolnshire
TF1000071000
53°13′29″N 0°21′14″W / 53.224667°N 0.35378615°W / 53.224667; -0.35378615 (Branston Island )
2,000,000
NA
NA
246
Brent
England
Greater London
TQ2160087100
51°34′11″N 0°14′49″W / 51.569668°N 0.24686808°W / 51.569668; -0.24686808 (Brent Reservoir )
1,632,330
1819
1835
126
Broomhead
England
South Yorkshire
SK2690095900
53°27′33″N 1°35′47″W / 53.459168°N 1.5963348°W / 53.459168; -1.5963348 (Broomhead Reservoir )
4,937,282
1867
1929
69
Brotherton Little Marsh to Birkin Holme Washland
England
North Yorkshire
SE5210025300
53°43′17″N 1°12′43″W / 53.721515°N 1.2119357°W / 53.721515; -1.2119357 (Brotherton Little Marsh to Birkin Holme Washland )
11,320,000
NA
NA
102
Burnhope
England
County Durham
NY8470039000
54°44′45″N 2°14′21″W / 54.745724°N 2.2391942°W / 54.745724; -2.2391942 (Burnhope Reservoir )
6,438,182
1931
1937
132
Burrator
[v]
England
Devon
SX5568768562
50°29′57″N 4°02′10″W / 50.499032°N 4.0361770°W / 50.499032; -4.0361770 (Burrator Reservoir )
4,464,000
1891
1898
232
Butterley
England
West Yorkshire
SE0470010500
53°35′28″N 1°55′50″W / 53.591059°N 1.9304674°W / 53.591059; -1.9304674 (Butterley Reservoir (Derbyshire) )
1,773,000
1789
1794
28
Caban Coch
Wales
Powys
SN9160063200
52°15′23″N 3°35′22″W / 52.256256°N 3.5895197°W / 52.256256; -3.5895197 (Caban Coch )
36,865,000
1892
[iv]
1904
218
Caldecott Lake
England
Buckinghamshire
SP8990035800
52°00′48″N 0°41′29″W / 52.013356°N 0.69150143°W / 52.013356; -0.69150143 (Caldecott Lake )
2,014,000
1967
1972
269
Cantref Reservoir
Wales
Powys
SN9938015840
51°49′55″N 3°27′42″W / 51.832079°N 3.4616252°W / 51.832079; -3.4616252 (Cantref Reservoir )
145,000
1884
[iv]
1892
29
Carsington
England
Derbyshire
SK2480051400
53°03′33″N 1°37′53″W / 53.059279°N 1.6314139°W / 53.059279; -1.6314139 (Carsington Water )
36,000,000
1973
[vi]
1992
75
Catcleugh
England
Northumberland
NT7470003100
55°19′17″N 2°24′01″W / 55.321313°N 2.4002361°W / 55.321313; -2.4002361 (Catcleugh Reservoir )
10,500,000
1888
1905
240
Catterall Flood Storage
England
Lancashire
SD4680041300
53°51′55″N 2°48′38″W / 53.865173°N 2.8104563°W / 53.865173; -2.8104563 (Catterall Flood Storage )
1,700,000
NA
1982
214
Cavendish Dock
England
Cumbria
SD2120068300
54°06′16″N 3°12′24″W / 54.104527°N 3.2066514°W / 54.104527; -3.2066514 (Cavendish Dock )
2,053,000
1863
1879
63
Cawood Ings Wistow Lordship
England
North Yorkshire
SE6050036000
53°49′00″N 1°04′57″W / 53.816769°N 1.0825621°W / 53.816769; -1.0825621 (Cawood Ings Wistow Lordship )
13,500,000
NA
NA
142
Chasewater
England
Staffordshire
SK0360007600
52°39′58″N 1°56′54″W / 52.666103°N 1.9482042°W / 52.666103; -1.9482042 (Chasewater )
3,691,000
1794
1797
108
Cheddar
England
Somerset
ST4410053700
51°16′47″N 2°48′10″W / 51.279686°N 2.8028357°W / 51.279686; -2.8028357 (Cheddar Reservoir )
6,140,000
1933
1938
270
Chelker
England
North Yorkshire
SE0564051600
53°57′38″N 1°54′56″W / 53.960456°N 1.9155302°W / 53.960456; -1.9155302 (Chelker Reservoir )
95,000
NA
1866
164
Chelmarsh
England
Shropshire
SO7340087500
52°29′05″N 2°23′35″W / 52.484765°N 2.3931329°W / 52.484765; -2.3931329 (Chelmarsh Reservoir )
3,063,320
1960
1963
273
Chew Magna
England
Somerset
ST5660063200
51°21′58″N 2°37′29″W / 51.366195°N 2.6247933°W / 51.366195; -2.6247933 (Chew Magna Reservoir )
43,000
1850
1850
47
Chew Valley Lake
England
Somerset
ST5700060000
51°20′15″N 2°37′07″W / 51.337453°N 2.6186602°W / 51.337453; -2.6186602 (Chew Valley Lake )
20,457,000
1939
[vi]
1956
111
Chrathaich
Scotland
Highland
NH3640020700
57°14′52″N 4°42′47″W / 57.247645°N 4.7131125°W / 57.247645; -4.7131125 (Chrathaich Reservoir )
5,629,000
1928
[vi]
1955
[iii]
177
Church Wilne
[v]
England
Derbyshire
SK4630032500
52°53′17″N 1°18′48″W / 52.887970°N 1.3133319°W / 52.887970; -1.3133319 (Church Wilne Reservoir )
2,790,000
NA
1972
22
Claerwen
Wales
Powys
SN8550065100
52°16′20″N 3°40′46″W / 52.272093°N 3.6794917°W / 52.272093; -3.6794917 (Claerwen Reservoir )
48,686,000
1892
[vi]
1952
116
Clatworthy
England
Somerset
ST0430031400
51°04′26″N 3°22′03″W / 51.073920°N 3.3673742°W / 51.073920; -3.3673742 (Clatworthy Reservoir )
5,364,000
1950
1958
197
Clifton Ings Washlands
England
North Yorkshire
SE5870053100
53°58′14″N 1°06′24″W / 53.970648°N 1.1066274°W / 53.970648; -1.1066274 (Clifton Ings Washlands )
2,300,000
NA
NA
34
Colliford Lake
England
Cornwall
SX1790071000
50°30′37″N 4°34′11″W / 50.510401°N 4.5696538°W / 50.510401; -4.5696538 (Colliford Lake )
29,100,000
1976
[vi]
1983
127
Colt Crag
England
Northumberland
NY9400078100
55°05′50″N 2°05′44″W / 55.097285°N 2.0955583°W / 55.097285; -2.0955583 (Colt Crag Reservoir )
4,855,000
1863
1884
73
Covenham
England
Lincolnshire
TF3463596017
53°26′37″N 0°01′32″E / 53.443731°N 0.025611218°E / 53.443731; 0.025611218 (Covenham Reservoir )
10,900,000
1963
1978
24
Cow Green
England
Durham
NY8120028900
54°39′17″N 2°17′34″W / 54.654841°N 2.2929079°W / 54.654841; -2.2929079 (Cow Green Reservoir )
40,914,000
1958
[iv]
1970
79
Craig Goch
Wales
Powys
SN8960069800
52°18′55″N 3°37′15″W / 52.315169°N 3.6209719°W / 52.315169; -3.6209719 (Craig Goch Reservoir )
9,583,000
1892
[iv]
1904
136
Cray
Wales
Powys
SN8850022000
51°53′07″N 3°37′17″W / 51.885373°N 3.6214431°W / 51.885373; -3.6214431 (Cray Reservoir )
4,027,000
1898
[v]
1906
[v]
186
Cropston
England
Leicestershire
SK5470011000
52°41′38″N 1°11′32″W / 52.693928°N 1.1920904°W / 52.693928; -1.1920904 (Cropston Reservoir )
2,528,000
1865
1870
48
Crowlands Cowbit Washes
England
Lincolnshire
TF2600016500
52°43′53″N 0°08′08″W / 52.731468°N 0.13545822°W / 52.731468; -0.13545822 (Crowlands Cowbit Washes )
20,000,000
NA
NA
147
Crummock Water
England
Cumbria
NY1510020800
54°34′31″N 3°18′54″W / 54.575257°N 3.3148907°W / 54.575257; -3.3148907 (Crummock Water )
3,400,000
NA
NA
70
Curry Moor Flood Storage Area
England
Somerset
ST3260027000
51°02′18″N 2°57′46″W / 51.038387°N 2.9626802°W / 51.038387; -2.9626802 (Curry Moor Flood Storage Area )
11,283,000
NA
NA
44
Daer
Scotland
South Lanarkshire
NS9757507812
55°21′13″N 3°37′01″W / 55.353611°N 3.6169925°W / 55.353611; -3.6169925 (Daer Reservoir )
22,494,000
1948
1956
205
Dale Dyke
England
South Yorkshire
SK2430091700
53°25′18″N 1°38′09″W / 53.421543°N 1.6358144°W / 53.421543; -1.6358144 (Dale Dyke Reservoir )
2,210,000
1853
[iv]
1875
118
Damflask
England
South Yorkshire
SK2840090700
53°24′44″N 1°34′27″W / 53.412351°N 1.5742116°W / 53.412351; -1.5742116 (Damflask Reservoir )
5,264,000
1864
1867
130
Darwell
[v]
England
East Sussex
TQ7150021200
50°57′53″N 0°26′27″E / 50.964696°N 0.44093306°E / 50.964696; 0.44093306 (Darwell Reservoir )
4,730,000
1937
1949
194
Delph
England
Greater Manchester
SD7030015400
53°38′03″N 2°27′02″W / 53.634273°N 2.4506272°W / 53.634273; -2.4506272 (Delph Reservoir )
2,326,700
1905
[i]
1921
80
Derwent
England
Derbyshire
SK1730089800
53°24′17″N 1°44′28″W / 53.404740°N 1.7412482°W / 53.404740; -1.7412482 (Derwent Reservoir (Derbyshire) )
9,470,000
1899
[iv]
1916
19
Derwent Reservoir
England
County Durham
NZ0250051400
54°51′27″N 1°57′45″W / 54.857386°N 1.9625840°W / 54.857386; -1.9625840 (Derwent Reservoir (Durham) )
50,060,000
1950
[vi]
1966
157
Digley
England
West Yorkshire
SE1100007000
53°33′34″N 1°50′07″W / 53.559507°N 1.8354124°W / 53.559507; -1.8354124 (Digley Reservoir )
3,260,000
1937
[iv]
1954
258
Doe Park
England
West Yorkshire
SE0780034200
53°48′15″N 1°52′59″W / 53.804041°N 1.8830465°W / 53.804041; -1.8830465 (Doe Park Reservoir )
422,000
1857
1862
266
Donolly Reservoir
Scotland
East Lothian
NT5780068700
55°54′34″N 2°40′36″W / 55.909541°N 2.6766156°W / 55.909541; -2.6766156 (Donolly Reservoir )
209,000
NA
NA
123
Dovestone
England
Greater Manchester
SE0160003600
53°31′45″N 1°58′38″W / 53.529058°N 1.9773335°W / 53.529058; -1.9773335 (Dovestone Reservoir )
5,048,000
1958
[iv]
1966
43
Draycote Water
England
Warwickshire
SP4600070000
52°19′34″N 1°19′35″W / 52.326175°N 1.3264618°W / 52.326175; -1.3264618 (Draycote Water )
22,730,000
1965
[vi]
1969
42
East Ings and Wood Holmes Washland Reservoir
England
North Yorkshire
SE5230024300
53°42′45″N 1°12′33″W / 53.712507°N 1.2090737°W / 53.712507; -1.2090737 (East Ings and Wood Holmes Washland Reservoir )
23,700,000
NA
NA
251
East Warwick
England
Greater London
TQ3480088500
51°34′45″N 0°03′22″W / 51.579250°N 0.055985047°W / 51.579250; -0.055985047 (East Warwick Reservoir )
742,000
1853
[iv]
1900
[v]
103
Eccup
England
West Yorkshire
SE3080041800
53°52′17″N 1°31′59″W / 53.871498°N 1.5330645°W / 53.871498; -1.5330645 (Eccup Reservoir )
6,410,000
1885
1897
153
Eglwys Nunydd
Wales
Neath Port Talbot
SS7920085500
51°33′19″N 3°44′38″W / 51.555411°N 3.7438321°W / 51.555411; -3.7438321 (Eglwys Nunydd Reservoir )
3,311,000
1957
[v]
1963
148
Ennerdale Water
England
Cumbria
NY0890015300
54°31′29″N 3°24′33″W / 54.524765°N 3.4090669°W / 54.524765; -3.4090669 (Ennerdale Water )
3,400,000
1902
1902
145
Entwistle
England
Blackburn with Darwen
SD7200017500
53°39′12″N 2°25′30″W / 53.653241°N 2.4251088°W / 53.653241; -2.4251088 (Entwistle Reservoir )
3,464,000
1832
1838
[v]
134
Errwood
England
Derbyshire
SK0140075200
53°16′26″N 1°58′50″W / 53.273783°N 1.9804662°W / 53.273783; -1.9804662 (Errwood Reservoir )
4,216,000
1930
[iv]
1967
90
Eyebrook
England
Leicestershire
SP8480094700
52°32′37″N 0°45′04″W / 52.543560°N 0.75099918°W / 52.543560; -0.75099918 (Eyebrook Reservoir )
8,096,000
1937
1940
187
Farmoor No. 1
England
Oxfordshire
SP4450006800
51°45′29″N 1°21′24″W / 51.758126°N 1.3566759°W / 51.758126; -1.3566759 (Farmoor No. 1 Reservoir )
2,505,000
1962
1967
122
Farmoor No. 2
England
Oxfordshire
SP4450006000
51°45′03″N 1°21′24″W / 51.750934°N 1.3567780°W / 51.750934; -1.3567780 (Farmoor No. 2 Reservoir )
5,055,000
1962
1977
125
Fernilee
England
Derbyshire
SK0130077700
53°17′47″N 1°58′55″W / 53.296255°N 1.9819564°W / 53.296255; -1.9819564 (Fernilee Reservoir )
4,944,000
1930
[iv]
1938
237
Fernworthy
England
Devon
SX6710084300
50°38′35″N 3°52′52″W / 50.643190°N 3.8809759°W / 50.643190; -3.8809759 (Fernworthy Reservoir )
1,727,300
1934
1942
141
Fewston
England
North Yorkshire
SE1870054100
53°58′57″N 1°42′59″W / 53.982621°N 1.7163354°W / 53.982621; -1.7163354 (Fewston Reservoir )
3,845,000
1874
1879
231
Ffynnon Llugwy
Wales
Conwy
SH6920062400
53°08′34″N 3°57′25″W / 53.142643°N 3.9569822°W / 53.142643; -3.9569822 (Ffynnon Llugwy Reservoir )
1,776,000
1915
1926
174
Fiddler's Ferry P.S. Ash Lagoon D
England
Cheshire
SJ5520085500
53°21′52″N 2°40′29″W / 53.364460°N 2.6746880°W / 53.364460; -2.6746880 (Fiddler's Ferry P.S. Ash Lagoon D )
2,900,000
NA
NA
154
Fontburn
England
Northumberland
NZ0450093500
55°14′08″N 1°55′51″W / 55.235687°N 1.9307831°W / 55.235687; -1.9307831 (Fontburn Reservoir )
3,279,000
1898
[iv]
1903
64
Foremark
England
Derbyshire
SK3290024400
52°48′58″N 1°30′48″W / 52.816142°N 1.5132885°W / 52.816142; -1.5132885 (Foremark Reservoir )
13,193,490
1966
1977
76
Fruid
Scotland
Scottish Borders
NT0968919217
55°27′30″N 3°25′47″W / 55.458437°N 3.4296968°W / 55.458437; -3.4296968 (Fruid Reservoir )
10,438,000
1953
[vi]
1968
82
Garreg Ddu
Wales
Powys
SN9110063900
52°15′45″N 3°35′49″W / 52.262447°N 3.5970679°W / 52.262447; -3.5970679 (Garreg Ddu Reservoir )
9,222,000
[2]
1892
[iv]
1904
89
Gladhouse
Scotland
Midlothian
NT2977853599
55°46′14″N 3°07′15″W / 55.770608°N 3.1208736°W / 55.770608; -3.1208736 (Gladhouse Reservoir )
8,133,000
NA
1879
84
Glen Finglas
Scotland
Stirling
NN5241009260
56°15′10″N 4°23′02″W / 56.252852°N 4.3838037°W / 56.252852; -4.3838037 (Glen Finglas Reservoir )
9,043,000
1911
1965
243
Glencorse
Scotland
Midlothian
NT2164763897
55°51′43″N 3°15′12″W / 55.861862°N 3.2534157°W / 55.861862; -3.2534157 (Glencorse Reservoir )
1,673,000
1819
1824
236
Gorple Upper
England
West Yorkshire
SD9240031400
53°46′44″N 2°07′01″W / 53.778874°N 2.1168095°W / 53.778874; -2.1168095 (Gorple Upper Reservoir )
1,731,000
1928
1934
110
Gouthwaite
England
North Yorkshire
SE1300069000
54°07′00″N 1°48′09″W / 54.116708°N 1.8026204°W / 54.116708; -1.8026204 (Gouthwaite Reservoir )
5,810,789
1893
1901
17
Grafham Water
[v]
England
Cambridgeshire
TL1700067000
52°17′19″N 0°17′10″W / 52.288689°N 0.28606805°W / 52.288689; -0.28606805 (Grafham Water )
55,490,000
1961
[vi]
1965
109
Grassholme
England
County Durham
NY9380022400
54°35′48″N 2°05′51″W / 54.596742°N 2.0974750°W / 54.596742; -2.0974750 (Grassholme Reservoir )
6,060,000
1876
[iv]
1915
146
Greenbooth
England
Greater Manchester
SD8530015200
53°37′59″N 2°13′26″W / 53.633114°N 2.2237757°W / 53.633114; -2.2237757 (Greenbooth Reservoir )
3,405,000
1958
1962
45
Grimwith
England
North Yorkshire
SE0600064200
54°04′25″N 1°54′35″W / 54.073696°N 1.9097996°W / 54.073696; -1.9097996 (Grimwith Reservoir )
22,200,000
1856
[vi]
1864
163
Hallington East
England
Northumberland
NY9730076300
55°04′52″N 2°02′38″W / 55.081140°N 2.0438290°W / 55.081140; -2.0438290 (Hallington East Reservoir )
3,116,740
1863
1872
149
Hallington West
England
Northumberland
NY9650076000
55°04′42″N 2°03′23″W / 55.078439°N 2.0563562°W / 55.078439; -2.0563562 (Hallington West Reservoir )
3,380,000
1876
1890
272
Hampton - Sunnyside
England
Greater London
TQ1270069000
51°24′32″N 0°22′52″W / 51.408835°N 0.38099829°W / 51.408835; -0.38099829 (Hampton - Sunnyside Reservoir )
71,000
1852
[iv]
1855
36
Hanningfield
England
Essex
TQ7330098400
51°39′28″N 0°30′14″E / 51.657668°N 0.50402549°E / 51.657668; 0.50402549 (Hanningfield Reservoir )
27,721,000
1949
[vi]
1957
13
Haweswater
England
Cumbria
NY5000015500
54°31′56″N 2°46′27″W / 54.532294°N 2.7741697°W / 54.532294; -2.7741697 (Haweswater Reservoir )
84,840,000
1880
[vi]
1935
176
Heaton Park
England
Greater Manchester
SD8250004700
53°32′19″N 2°15′56″W / 53.538652°N 2.2655256°W / 53.538652; -2.2655256 (Heaton Park Reservoir )
2,800,000
1954
1955
263
Hewenden
England
West Yorkshire
SE0740035600
53°49′00″N 1°53′21″W / 53.816630°N 1.8890870°W / 53.816630; -1.8890870 (Hewenden Reservoir )
252,000
1842
1846
254
High Maynard
England
Greater London
TQ3550089600
51°35′20″N 0°02′44″W / 51.588967°N 0.045464928°W / 51.588967; -0.045464928 (High Maynard Reservoir )
659,000
1867
[iv]
[v]
1870
[v]
181
Hilfield Park
[v]
England
Hertfordshire
TQ1570096000
51°39′03″N 0°19′44″W / 51.650897°N 0.32902291°W / 51.650897; -0.32902291 (Hilfield Park Reservoir )
2,728,000
NA
1955
189
Hollingworth Lake
England
Greater Manchester
SD9350015300
53°38′03″N 2°05′59″W / 53.634181°N 2.0997734°W / 53.634181; -2.0997734 (Hollingworth Lake )
2,468,000
1794
1800
213
Hollowell
England
Northamptonshire
SP6900072400
52°20′43″N 0°59′19″W / 52.345343°N 0.98853688°W / 52.345343; -0.98853688 (Hollowell Reservoir )
2,064,000
1936
1939
256
Hopes
Scotland
East Lothian
NT5470062100
55°51′00″N 2°43′30″W / 55.849963°N 2.7250932°W / 55.849963; -2.7250932 (Hopes Reservoir )
600,000
NA
1933
85
Howden
England
Derbyshire
SK1700092500
53°25′44″N 1°44′44″W / 53.429018°N 1.7456160°W / 53.429018; -1.7456160 (Howden Reservoir )
8,990,000
1899
[iv]
1916
139
Hury
England
County Durham
NY9650019600
54°34′18″N 2°03′20″W / 54.571606°N 2.0556516°W / 54.571606; -2.0556516 (Hury Reservoir )
3,905,000
1876
[iv]
1894
137
Island Barn
England
Surrey
TQ1390067000
51°23′26″N 0°21′52″W / 51.390619°N 0.36439363°W / 51.390619; -0.36439363 (Island Barn Reservoir )
4,011,000
1900
[iv]
1911
215
Jumbles
England
Greater Manchester
SD7350013900
53°37′15″N 2°24′08″W / 53.620963°N 2.4021067°W / 53.620963; -2.4021067 (Jumbles Reservoir )
2,050,000
1971
1971
61
Kellington Ings Reservoir
England
North Yorkshire
SE5910024500
53°42′49″N 1°06′22″W / 53.713581°N 1.1060210°W / 53.713581; -1.1060210 (Kellington Ings Reservoir )
14,400,000
NA
NA
6
Kielder
England
Northumberland
NY7080087500
55°10′51″N 2°27′36″W / 55.180922°N 2.4600692°W / 55.180922; -2.4600692 (Kielder Reservoir )
199,000,000
1971
[vi]
1981
159
Killington
England
Cumbria
SD5900091000
54°18′47″N 2°37′54″W / 54.312936°N 2.6317055°W / 54.312936; -2.6317055 (Killington Reservoir )
3,238,210
1817
1819
217
Kinder
England
Derbyshire
SK0585088190
53°23′26″N 1°54′49″W / 53.390517°N 1.9135015°W / 53.390517; -1.9135015 (Kinder Reservoir )
2,028,000
1899
[iv]
1912
72
King George V
England
Greater London
TQ3740096500
51°39′02″N 0°00′55″W / 51.650510°N 0.015352701°W / 51.650510; -0.015352701 (King George V Reservoir )
10,981,000
1893
1912
51
King George VI
England
Surrey
TQ0410073200
51°26′54″N 0°30′12″W / 51.448229°N 0.50336831°W / 51.448229; -0.50336831 (King George VI Reservoir )
18,732,000
1936
1947
35
Ladybower
England
Derbyshire
SK2000085500
53°21′58″N 1°42′03″W / 53.365994°N 1.7009077°W / 53.365994; -1.7009077 (Ladybower Reservoir )
27,800,000
1920
[iv]
1943
222
Lamaload
England
Cheshire
SJ9710075300
53°16′29″N 2°02′42″W / 53.274675°N 2.0449474°W / 53.274675; -2.0449474 (Lamaload Reservoir )
1,932,000
1958
1963
104
Langsett
England
South Yorkshire
SE2140000200
53°29′53″N 1°40′44″W / 53.498069°N 1.6788755°W / 53.498069; -1.6788755 (Langsett Reservoir )
6,401,000
1897
1904
259
Leeming
England
West Yorkshire
SE0380034400
53°48′21″N 1°56′38″W / 53.805882°N 1.9437800°W / 53.805882; -1.9437800 (Leeming Reservoir )
408,000
1872
1878
113
Leigh Barrier (Medway) FSR
England
Kent
TQ5650046300
51°11′40″N 0°14′18″E / 51.194493°N 0.23836213°E / 51.194493; 0.23836213 (Leigh Barrier (Medway) FSR )
5,580,000
1976
[iv]
1982
128
Leighton
England
North Yorkshire
SE1620078800
54°12′17″N 1°45′11″W / 54.204694°N 1.7531441°W / 54.204694; -1.7531441 (Leighton Reservoir )
4,780,000
1908
1926
165
Lindley Wood
England
North Yorkshire
SE2150049300
53°56′22″N 1°40′26″W / 53.939372°N 1.6739758°W / 53.939372; -1.6739758 (Lindley Wood Reservoir )
3,045,000
1870
1874
167
Linton Ings
England
North Yorkshire
SE4840060400
54°02′14″N 1°15′45″W / 54.037317°N 1.2624729°W / 54.037317; -1.2624729 (Linton Ings Reservoir )
3,000,000
NA
NA
238
Little Swinburne
England
Northumberland
NY9450077200
55°05′21″N 2°05′16″W / 55.089204°N 2.0877054°W / 55.089204; -2.0877054 (Little Swinburne Reservoir )
1,721,000
1863
1879
41
Llandegfedd
Wales
Monmouhtshire /
Torfaen
ST3260098500
51°40′52″N 2°58′35″W / 51.681200°N 2.9762550°W / 51.681200; -2.9762550 (Llandegfedd Reservoir )
24,492,000
1957
[vi]
1964
121
Llwyn-On
Wales
Rhondda Cynon Taf
SO0110011400
51°47′33″N 3°26′07″W / 51.792479°N 3.4354039°W / 51.792479; -3.4354039 (Llwyn-On Reservoir )
5,066,000
1884
[iv]
1926
95
Llyn Alaw
Wales
Gwynedd
SH3740085400
53°20′26″N 4°26′37″W / 53.340440°N 4.4437297°W / 53.340440; -4.4437297 (Llyn Alaw Reservoir )
7,400,000
1961
1965
230
Llyn Aled
[v]
Wales
Conwy
SH9160057900
53°06′26″N 3°37′15″W / 53.107241°N 3.6207301°W / 53.107241; -3.6207301 (Llyn Aled Reservoir )
1,777,000
NA
1934
93
Llyn Arenig Fawr
Wales
Gwynedd
SH8500037900
52°55′34″N 3°42′44″W / 52.926156°N 3.7121426°W / 52.926156; -3.7121426 (Llyn Arenig Fawr Reservoir )
7,488,000
NA
1830
18
Llyn Brenig
Wales
Conwy /
Denbighshire
SH9770054300
53°04′34″N 3°31′43″W / 53.076098°N 3.5284979°W / 53.076098; -3.5284979 (Llyn Brenig Reservoir )
54,273,000
1973
[vi]
1979
30
Llyn Brianne
Wales
Powys
SN7910048500
52°07′18″N 3°46′02″W / 52.121552°N 3.7673117°W / 52.121552; -3.7673117 (Llyn Brianne Reservoir )
32,882,000
1967
[vi]
1972
23
Llyn Celyn
Wales
Gwynedd
SH8592140424
52°56′57″N 3°41′58″W / 52.949031°N 3.6993374°W / 52.949031; -3.6993374 (Llyn Celyn Reservoir )
40,959,000
1957
[vi]
1965
21
Clywedog Reservoir (Llyn Clywedog)
Wales
Powys
SN8980088500
52°29′00″N 3°37′27″W / 52.483257°N 3.6242003°W / 52.483257; -3.6242003 (Clywedog Reservoir )
48,828,000
1963
[vi]
1967
81
Llyn Cowlyd
Wales
Conwy
SH7380063400
53°09′10″N 3°53′19″W / 53.152737°N 3.8886457°W / 53.152737; -3.8886457 (Llyn Cowlyd Reservoir )
9,432,000
1891
[iv]
1897
241
Llyn Cwellyn
[v]
Wales
Gwynedd
SH5540055600
53°04′41″N 4°09′36″W / 53.077993°N 4.1600815°W / 53.077993; -4.1600815 (Llyn Cwellyn Reservoir )
1,687,000
NA
1976
173
Llyn Cwmystradllyn
[v]
Wales
Gwynedd
SH5620044300
52°58′36″N 4°08′35″W / 52.976703°N 4.1431080°W / 52.976703; -4.1431080 (Llyn Cwmystradllyn Reservoir )
2,902,000
1959
1959
226
Llyn Peris
Wales
Gwynedd
SH5870059900
53°07′03″N 4°06′46″W / 53.117503°N 4.1127477°W / 53.117503; -4.1127477 (Llyn Peris Reservoir )
1,870,000
1973
1979
250
Llyn Stwlan
Wales
Gwynedd
SH6660044400
52°58′49″N 3°59′18″W / 52.980292°N 3.9883645°W / 52.980292; -3.9883645 (Llyn Stwlan Reservoir )
747,000
1952
[vi]
1963
11
Bala Lake (Llyn Tegid)
Wales
Gwynedd
SH9290035000
52°54′06″N 3°35′37″W / 52.901732°N 3.5937195°W / 52.901732; -3.5937195 (Llyn Tegid (Bala Lake) Reservoir )
106,751,000
1803
1804
40
Llyn Trawsfynydd
Wales
Gwynedd
SH6940038200
52°55′31″N 3°56′39″W / 52.925281°N 3.9441860°W / 52.925281; -3.9441860 (Llyn Trawsfynydd Reservoir )
26,108,000
1924
[v]
1928
140
Loch Achonachie
Scotland
Highland
NH4460054600
57°33′17″N 4°35′56″W / 57.554706°N 4.5988314°W / 57.554706; -4.5988314 (Loch Achonachie Reservoir )
3,873,000
1943
[ii]
1954
[iii]
37
Loch an Diamh
Scotland
Perth and Kinross
NN5086746354
56°35′07″N 4°25′47″W / 56.585328°N 4.4298309°W / 56.585328; -4.4298309 (Loch an Diamh Reservoir )
27,052,000
1953
[vi]
1959
[iii]
57
Loch Arklet
Scotland
Stirling
NN3778009120
56°14′49″N 4°37′11″W / 56.246825°N 4.6195911°W / 56.246825; -4.6195911 (Loch Arklet Reservoir )
16,286,000
1902
1914
54
Loch Bradan
Scotland
South Ayrshire
NX4205297297
55°14′40″N 4°29′10″W / 55.244500°N 4.4860239°W / 55.244500; -4.4860239 (Loch Bradan Reservoir )
17,475,000
1908
[iv]
1912
105
Loch Drunkie
Scotland
Stirling
NN5425004390
56°12′35″N 4°21′05″W / 56.209704°N 4.3514522°W / 56.209704; -4.3514522 (Loch Drunkie Reservoir )
6,346,000
1854
1864
4
Loch Earn
Scotland
Perth and Kinross
NN6990024200
56°23′32″N 4°06′33″W / 56.392099°N 4.1091174°W / 56.392099; -4.1091174 (Loch Earn Reservoir )
397,630,000
1943
[ii]
1958
[iii]
190
Loch Eigheach Gaur
Scotland
Perth and Kinross
NN4610056900
56°40′42″N 4°30′49″W / 56.678440°N 4.5136547°W / 56.678440; -4.5136547 (Loch Eigheach Gaur Reservoir )
2,461,000
1943
[ii]
1953
[iii]
1
Loch Ericht
Scotland
Perth and Kinross
NN5080062700
56°43′55″N 4°26′25″W / 56.732022°N 4.4403880°W / 56.732022; -4.4403880 (Loch Ericht Reservoir )
1,291,596,000
1912
[vi]
1962
[iii]
8
Loch Garry
Scotland
Highland
NH2760002100
57°04′39″N 4°50′45″W / 57.077537°N 4.8459025°W / 57.077537; -4.8459025 (Loch Garry Reservoir )
163,272,000
1943
[ii]
1956
[iii]
249
Loch Gleann A'Bhearraidh
Scotland
Argyll and Bute
NM8446426911
56°23′07″N 5°29′35″W / 56.385184°N 5.4930136°W / 56.385184; -5.4930136 (Loch Gleann A'Bhearraidh Reservoir )
774,000
1939
1939
2
Loch Katrine
Scotland
Stirling
NN4433509530
56°15′10″N 4°30′51″W / 56.252698°N 4.5141613°W / 56.252698; -4.5141613 (Loch Katrine Reservoir )
804,704,000
1848
1859
49
Loch Loyne
Scotland
Highland
NH2010007900
57°07′36″N 4°58′25″W / 57.126700°N 4.9736204°W / 57.126700; -4.9736204 (Loch Loyne Reservoir )
19,859,000
1938
[vi]
1957
[iii]
9
Loch Luichart
Scotland
Highland
NH3650061500
57°36′50″N 4°44′19″W / 57.613757°N 4.7386845°W / 57.613757; -4.7386845 (Loch Luichart Reservoir )
128,124,000
1943
[ii]
1954
[iii]
16
Loch Lyon
Scotland
Perth and Kinross
NN4520041700
56°32′30″N 4°31′09″W / 56.541721°N 4.5192239°W / 56.541721; -4.5192239 (Loch Lyon Reservoir )
59,270,000
1951
[vi]
1958
[iii]
58
Loch Nant
Scotland
Argyll and Bute
NN0030024900
56°22′27″N 5°14′08″W / 56.374101°N 5.2354396°W / 56.374101; -5.2354396 (Loch Nant Reservoir )
15,464,000
1959
[vi]
1963
[iii]
3
Loch Quoich
Scotland
Highland
NH0710002300
57°04′16″N 5°11′01″W / 57.071201°N 5.1837051°W / 57.071201; -5.1837051 (Loch Quoich Reservoir )
556,677,000
1928
[vi]
1955
[iii]
260
Loch Spey
Scotland
Highland
NN5810093700
57°00′45″N 4°20′19″W / 57.012555°N 4.3384944°W / 57.012555; -4.3384944 (Loch Spey Reservoir )
356,000
1918
[iv]
1938
86
Loch Thom
Scotland
Renfrewshire
NS2594872193
55°54′41″N 4°47′11″W / 55.911261°N 4.7862577°W / 55.911261; -4.7862577 (Loch Thom Reservoir )
8,668,000
1824
1827
65
Loch Vaich
Scotland
Highland
NH3460074900
57°44′00″N 4°46′47″W / 57.733285°N 4.7796402°W / 57.733285; -4.7796402 (Loch Vaich Reservoir )
12,388,000
1943
[ii]
1957
[iii]
20
Loch Venachar
Scotland
Stirling
NN5743905550
56°13′16″N 4°18′03″W / 56.221084°N 4.3007086°W / 56.221084; -4.3007086 (Loch Venachar Reservoir )
49,358,000
1854
1857
211
Lockwood
England
Greater London
TQ3530090200
51°35′40″N 0°02′53″W / 51.594407°N 0.048118991°W / 51.594407; -0.048118991 (Lockwood Reservoir )
2,106,000
1893
[iv]
1903
257
Loganlea
Scotland
Midlothian
NT1944262397
55°50′53″N 3°17′17″W / 55.848025°N 3.2881891°W / 55.848025; -3.2881891 (Loganlea Reservoir )
532,000
1847
1851
271
Low Maynard
England
Greater London
TQ3550089600
51°35′20″N 0°02′44″W / 51.588967°N 0.045464928°W / 51.588967; -0.045464928 (Low Maynard Reservoir )
80,000
1867
[iv]
[v]
1870
[v]
124
Marchlyn Mawr
Wales
Gwynedd
SH6170062200
53°08′20″N 4°04′08″W / 53.138951°N 4.0689468°W / 53.138951; -4.0689468 (Marchlyn Mawr Reservoir )
5,017,000
1973
1979
14
Megget
Scotland
Scottish Borders
NT1925822198
55°29′13″N 3°16′45″W / 55.486890°N 3.2792883°W / 55.486890; -3.2792883 (Megget Reservoir )
63,722,000
1963
1983
162
Meldon
England
Devon
SX5630091600
50°42′22″N 4°02′11″W / 50.706230°N 4.0364604°W / 50.706230; -4.0364604 (Meldon Reservoir )
3,170,000
1962
[vi]
1972
245
Mickletown Washland
England
West Yorkshire
SE4150027100
53°44′19″N 1°22′20″W / 53.738640°N 1.3723192°W / 53.738640; -1.3723192 (Mickletown Washland Reservoir )
1,655,000
NA
NA
227
Midhope
England
South Yorkshire
SK2230099400
53°29′27″N 1°39′55″W / 53.490841°N 1.6653653°W / 53.490841; -1.6653653 (Midhope Reservoir )
1,859,000
1895
1903
244
Misson East FSA
England
Nottinghamshire
SK7090094900
53°26′46″N 0°56′02″W / 53.446107°N 0.93397635°W / 53.446107; -0.93397635 (Misson East FSA )
1,670,000
NA
NA
233
Misson West FSA
England
Nottinghamshire
SK6850094000
53°26′18″N 0°58′13″W / 53.438336°N 0.97030047°W / 53.438336; -0.97030047 (Misson West FSA )
1,750,000
NA
NA
207
More Hall
England
South Yorkshire
SK2870095800
53°27′29″N 1°34′09″W / 53.458175°N 1.5692355°W / 53.458175; -1.5692355 (More Hall Reservoir )
2,172,989
1867
1929
7
Mullardoch
Scotland
Highland
NH2220031300
57°20′15″N 4°57′21″W / 57.337439°N 4.9557405°W / 57.337439; -4.9557405 (Mullardoch Reservoir )
165,226,000
1943
[ii]
1951
39
Nant-y-Moch
Wales
Ceredigion
SN7540086200
52°27′34″N 3°50′07″W / 52.459490°N 3.8352785°W / 52.459490; -3.8352785 (Nant-y-Moch Reservoir )
26,292,000
1955
[iv]
1964
193
Northampton Washlands
England
West Northamptonshire
SP7950060200
52°14′03″N 0°50′14″W / 52.234265°N 0.83730834°W / 52.234265; -0.83730834 (Northampton Washlands )
2,340,000
NA
NA
107
Ogston
England
Derbyshire
SK3780059900
53°08′06″N 1°26′11″W / 53.134923°N 1.4364542°W / 53.134923; -1.4364542 (Ogston Reservoir )
6,180,000
1953
[iv]
1958
198
Oldbury Power Station
England
Gloucestershire
ST6000095000
51°39′08″N 2°34′46″W / 51.652358°N 2.5795759°W / 51.652358; -2.5795759 (Oldbury Power Station Reservoir )
2,300,000
NA
NA
12
Ouse Washes
England
Cambridgeshire
TL5000089000
52°28′42″N 0°12′26″E / 52.478317°N 0.20724239°E / 52.478317; 0.20724239 (Ouse Washes Reservoir )
90,000,000
NA
1652
114
Penygarreg
Wales
Powys
SN9030067400
52°17′37″N 3°36′36″W / 52.293742°N 3.6099246°W / 52.293742; -3.6099246 (Penygarreg Reservoir )
5,558,000
1892
[iv]
1904
53
Pitsford
England
Northamptonshire
SP7550068900
52°18′47″N 0°53′38″W / 52.313028°N 0.89392331°W / 52.313028; -0.89392331 (Pitsford Reservoir )
17,545,000
1946
1955
74
Pontsticill (Taf Fechan)
Wales
Merthyr Tydfil /
Powys
SO0610011800
51°47′49″N 3°21′47″W / 51.796937°N 3.3630375°W / 51.796937; -3.3630375 (Pontsticill (Taf Fechan) Reservoir )
10,717,000
1921
[vi]
1927
55
Queen Elizabeth II
England
Surrey
TQ1180067100
51°23′31″N 0°23′40″W / 51.391935°N 0.39453096°W / 51.391935; -0.39453096 (Queen Elizabeth II Reservoir )
16,809,000
1935
1967
33
Queen Mary
England
Surrey
TQ0730069700
51°24′58″N 0°27′30″W / 51.416173°N 0.45839646°W / 51.416173; -0.45839646 (Queen Mary Reservoir )
30,363,000
1911
[vi]
1925
31
Queen Mother
England
Berkshire
TQ0090076800
51°28′52″N 0°32′54″W / 51.481166°N 0.54837454°W / 51.481166; -0.54837454 (Queen Mother Reservoir )
31,492,000
1945
[vi]
1976
225
Ravensthorpe
England
West Northamptonshire
SP6810070400
52°19′39″N 1°00′08″W / 52.327477°N 1.0021509°W / 52.327477; -1.0021509 (Ravensthorpe Reservoir )
1,884,000
1880
1890
200
Rhodeswood
England
Derbyshire
SK0440098200
53°28′50″N 1°56′07″W / 53.480505°N 1.9351681°W / 53.480505; -1.9351681 (Rhodeswood Reservoir )
2,273,000
1848
1855
262
River Shin
Scotland
Highland
NC5820005100
58°00′45″N 4°24′06″W / 58.012378°N 4.4016958°W / 58.012378; -4.4016958 (River Shin Reservoir )
316,000
1954
[vi]
1958
[iii]
161
River Till Controlled Washland
England
Nottinghamshire
SK7030077500
53°17′23″N 0°56′49″W / 53.289812°N 0.94687140°W / 53.289812; -0.94687140 (River Till Controlled Washland )
3,200,000
1977
1990
106
River Witham Flood Washlands
England
Lincolnshire
SK9520063800
53°09′46″N 0°34′39″W / 53.162822°N 0.57753531°W / 53.162822; -0.57753531 (River Witham Flood Washlands )
6,300,000
NA
NA
100
Rivington Lower
England
Lancashire
SD6300012400
53°36′25″N 2°33′38″W / 53.606843°N 2.5606621°W / 53.606843; -2.5606621 (Rivington Lower )
6,516,000
1850
1857
27
Roadford
England
Devon
SX4200090000
50°41′17″N 4°14′17″W / 50.688140°N 4.2381365°W / 50.688140; -4.2381365 (Roadford Reservoir )
36,910,000
1976
[vi]
1989
188
Roundhill
England
North Yorkshire
SE1500077200
54°11′25″N 1°46′18″W / 54.190351°N 1.7716197°W / 54.190351; -1.7716197 (Roundhill Reservoir )
2,503,000
NA
1910
170
Rudyard
England
Staffordshire
SJ9450059600
53°08′01″N 2°05′01″W / 53.133529°N 2.0836602°W / 53.133529; -2.0836602 (Rudyard Reservoir )
2,949,700
NA
1796
10
Rutland Water
England
Rutland
SK9440008000
52°39′41″N 0°36′20″W / 52.661511°N 0.60569370°W / 52.661511; -0.60569370 (Rutland Water )
124,000,000
1968
[vi]
1976
242
Scaling
England
North Yorkshire
NZ7490012800
54°30′18″N 0°50′41″W / 54.504993°N 0.84482832°W / 54.504993; -0.84482832 (Scaling Reservoir )
1,682,000
1946
1958
91
Scammonden
England
West Yorkshire
SE0530016700
53°38′48″N 1°55′17″W / 53.646781°N 1.9212997°W / 53.646781; -1.9212997 (Scammonden Reservoir )
7,873,000
1965
1969
77
Scar House
England
North Yorkshire
SE0580076900
54°11′16″N 1°54′45″W / 54.187839°N 1.9126169°W / 54.187839; -1.9126169 (Scar House Reservoir )
10,069,000
1921
1936
171
Seathwaite Tarn
England
Cumbria
SD2500098600
54°22′38″N 3°09′22″W / 54.377355°N 3.1561370°W / 54.377355; -3.1561370 (Seathwaite Tarn Reservoir )
2,945,000
1900
1907
59
Selset
England
County Durham
NY9180021100
54°35′06″N 2°07′42″W / 54.585031°N 2.1283928°W / 54.585031; -2.1283928 (Selset Reservoir )
15,320,000
1955
1960
223
Shustoke Lower
England
Warwickshire
SP2280091200
52°31′06″N 1°39′56″W / 52.518210°N 1.6654290°W / 52.518210; -1.6654290 (Shustoke Lower Reservoir )
1,921,000
1870
[iv]
1884
150
Siblyback
England
Cornwall
SX2320070300
50°30′21″N 4°29′41″W / 50.505737°N 4.4946487°W / 50.505737; -4.4946487 (Siblyback Reservoir )
3,364,000
1965
1969
62
Silent Valley
Northern Ireland
County Down
SB3865978967
54°08′24″N 6°00′10″W / 54.139876°N 6.0027439°W / 54.139876; -6.0027439 (Silent Valley Reservoir )
13,638,270
1910
1933
97
Staines North
England
Surrey
TQ0500073600
51°27′06″N 0°29′25″W / 51.451658°N 0.49030334°W / 51.451658; -0.49030334 (Staines North Reservoir )
6,940,000
1898
[iv]
1902
94
Staines South
England
Surrey
TQ0500072500
51°26′30″N 0°29′26″W / 51.441771°N 0.49062937°W / 51.441771; -0.49062937 (Staines South Reservoir )
7,469,000
1898
[iv]
1902
99
Staunton Harold
England
Derbyshire
SK3767923473
52°48′27″N 1°26′33″W / 52.807498°N 1.4424902°W / 52.807498; -1.4424902 (Staunton Harold Reservoir )
6,655,000
1958
[vi]
1964
115
Stithians
England
Cornwall
SW7190036400
50°11′01″N 5°11′47″W / 50.183607°N 5.1965073°W / 50.183607; -5.1965073 (Stithians Reservoir )
5,420,000
1955
[vi]
1967
68
Stocks
England
Lancashire
SD7200054600
53°59′12″N 2°25′43″W / 53.986684°N 2.4284992°W / 53.986684; -2.4284992 (Stocks Reservoir )
11,800,000
1910
1932
203
Strines
England
South Yorkshire
SK2320090500
53°24′39″N 1°39′09″W / 53.410806°N 1.6524541°W / 53.410806; -1.6524541 (Strines Reservoir )
2,239,000
1853
[iv]
1869
184
Sutton Bingham
England
Somerset
ST5540011400
50°54′01″N 2°38′08″W / 50.900343°N 2.6356000°W / 50.900343; -2.6356000 (Sutton Bingham Reservoir )
2,600,000
1952
1955
138
Swinsty
England
North Yorkshire
SE1960053400
53°58′35″N 1°42′10″W / 53.976296°N 1.7026564°W / 53.976296; -1.7026564 (Swinsty Reservoir )
3,936,000
1871
1877
204
Swithland
England
Leicestershire
SK5570014800
52°43′41″N 1°10′36″W / 52.727983°N 1.1766534°W / 52.727983; -1.1766534 (Swithland Reservoir )
2,227,540
1890
1896
180
"Tadcaster, Hackenby, North Ings and Cock Beck"
England
North Yorkshire
SE4950042000
53°52′19″N 1°14′55″W / 53.871853°N 1.2486563°W / 53.871853; -1.2486563 (Tadcaster, Hackenby, North Ings and Cock Beck Reservoir )
2,748,750
NA
NA
66
Talla
Scotland
Scottish Borders
NT1171721532
55°28′47″N 3°23′54″W / 55.479603°N 3.3983738°W / 55.479603; -3.3983738 (Talla Reservoir )
12,020,000
1897
1905
67
Talybont
Wales
Powys
SO1060020500
51°52′33″N 3°18′00″W / 51.875877°N 3.3000529°W / 51.875877; -3.3000529 (Talybont Reservoir )
11,921,000
1930
1939
221
Tanygrisiau
Wales
Gwynedd
SH6830044700
52°59′00″N 3°57′47″W / 52.983408°N 3.9631826°W / 52.983408; -3.9631826 (Tanygrisiau Reservoir )
1,970,000
1952
[vi]
1963
25
Thirlmere
England
Cumbria
NY3100019000
54°33′41″N 3°04′07″W / 54.561506°N 3.0685524°W / 54.561506; -3.0685524 (Thirlmere Reservoir )
40,714,000
1879
[vi]
1894
92
Thruscross
England
North Yorkshire
SE1520057800
54°00′58″N 1°46′10″W / 54.015989°N 1.7695224°W / 54.015989; -1.7695224 (Thruscross Reservoir )
7,800,000
1955
[vi]
1966
101
Tittesworth
England
Staffordshire
SJ9930058700
53°07′32″N 2°00′43″W / 53.125468°N 2.0119145°W / 53.125468; -2.0119145 (Tittesworth Reservoir )
6,440,000
1858
1858
98
Torside
England
Derbyshire
SK0560098300
53°28′53″N 1°55′02″W / 53.481393°N 1.9170845°W / 53.481393; -1.9170845 (Torside Reservoir )
6,700,000
1848
1864
192
Tunstall
England
County Durham
NZ0650040800
54°45′44″N 1°54′02″W / 54.762095°N 1.9005097°W / 54.762095; -1.9005097 (Tunstall Reservoir )
2,360,000
1873
1879
169
Underbank
England
South Yorkshire
SK2530099200
53°29′20″N 1°37′13″W / 53.488908°N 1.6201667°W / 53.488908; -1.6201667 (Underbank Reservoir )
2,955,000
1897
1904
71
Usk
Wales
Carmarthenshire /
Powys
SN8217428549
51°56′35″N 3°42′56″W / 51.942925°N 3.7155557°W / 51.942925; -3.7155557 (Usk Reservoir )
11,235,000
1950
1955
182
Vale House
England
Derbyshire
SK0326097420
53°28′25″N 1°57′08″W / 53.473502°N 1.9523536°W / 53.473502; -1.9523536 (Vale House Reservoir )
2,688,000
1848
1870
15
Vyrnwy
Wales
Powys
SJ0180019300
52°45′44″N 3°27′24″W / 52.762346°N 3.4567214°W / 52.762346; -3.4567214 (Vyrnwy Reservoir )
59,852,000
1879
[i]
1888
252
Walthamstow No.4
England
Greater London
TQ3540089100
51°35′04″N 0°02′50″W / 51.584498°N 0.047100199°W / 51.584498; -0.047100199 (Walthamstow No.4 Reservoir )
680,000
1853
[iv]
1866
[v]
253
Walthamstow No.5
England
Greater London
TQ3550088600
51°34′48″N 0°02′45″W / 51.579981°N 0.045850528°W / 51.579981; -0.045850528 (Walthamstow No.5 Reservoir )
680,000
1853
[iv]
1866
[v]
179
Walton - Bessborough
England
Surrey
TQ1220068000
51°24′00″N 0°23′19″W / 51.399946°N 0.38850014°W / 51.399946; -0.38850014 (Walton - Bessborough Reservoir )
2,757,000
1898
1907
228
Walton - Knight
England
Surrey
TQ1170068000
51°24′00″N 0°23′44″W / 51.400044°N 0.39568466°W / 51.400044; -0.39568466 (Walton - Knight Reservoir )
1,857,000
1898
1907
216
Waskerley
England
County Durham
NZ0250044300
54°47′37″N 1°57′46″W / 54.793583°N 1.9626426°W / 54.793583; -1.9626426 (Waskerley Reservoir )
2,046,500
1877
1877
156
Watergrove
England
Greater Manchester
SD9100017700
53°39′21″N 2°08′16″W / 53.655715°N 2.1376509°W / 53.655715; -2.1376509 (Watergrove Reservoir )
3,273,000
1930
1938
120
Wayoh
England
Lancashire
SD7370016400
53°38′36″N 2°23′57″W / 53.643443°N 2.3992954°W / 53.643443; -2.3992954 (Wayoh Reservoir )
5,100,000
1865
[vi]
1876
112
Weirwood
England
East Sussex
TQ4060035300
51°05′59″N 0°00′24″E / 51.099772°N 0.0066761370°E / 51.099772; 0.0066761370 (Weirwood Reservoir )
5,623,000
1950
1954
235
Wentwood
Wales
Newport
ST4300092900
51°37′55″N 2°49′30″W / 51.632009°N 2.8249355°W / 51.632009; -2.8249355 (Wentwood Reservoir )
1,739,000
1896
1904
117
West Moor Reservoir
England
Somerset
ST4160032600
51°05′23″N 2°50′07″W / 51.089725°N 2.8352377°W / 51.089725; -2.8352377 (West Moor Reservoir )
5,359,000
NA
NA
255
West Warwick
England
Greater London
TQ3460088300
51°34′39″N 0°03′32″W / 51.577501°N 0.058946209°W / 51.577501; -0.058946209 (West Warwick Reservoir )
639,000
1853
[iv]
1900
[v]
151
West Water
Scotland
Scottish Borders
NT1173052377
55°45′24″N 3°24′29″W / 55.756672°N 3.4080668°W / 55.756672; -3.4080668 (West Water Reservoir )
3,364,000
1966
1969
199
Wet Sleddale
England
Cumbria
NY5530011600
54°29′52″N 2°41′30″W / 54.497744°N 2.6916824°W / 54.497744; -2.6916824 (Wet Sleddale Reservoir )
2,282,000
1880
[vi]
1966
247
White Holme
England
West Yorkshire
SD9710019900
53°40′32″N 2°02′43″W / 53.675560°N 2.0453756°W / 53.675560; -2.0453756 (White Holme Reservoir )
1,601,000
1807
[iv]
1816
133
Whiteadder
Scotland
East Lothian
NT6540063500
55°51′48″N 2°33′16″W / 55.863430°N 2.5543847°W / 55.863430; -2.5543847 (Whiteadder Reservoir )
4,239,000
1959
[v]
1968
172
Widdop
England
West Yorkshire
SD9300033000
53°47′36″N 2°06′28″W / 53.793263°N 2.1077415°W / 53.793263; -2.1077415 (Widdop Reservoir )
2,912,000
1872
1878
219
Willen Lake
England
Buckinghamshire
SP8810040900
52°03′34″N 0°42′59″W / 52.059485°N 0.71640948°W / 52.059485; -0.71640948 (Willen Lake Reservoir )
2,004,000
1967
1972
56
William Girling
England
Greater London
TQ3670094100
51°37′45″N 0°01′35″W / 51.629115°N 0.026400980°W / 51.629115; -0.026400980 (William Girling Reservoir )
16,500,000
1935
[v]
1951
46
Wimbleball
England
Somerset
SS9670029300
51°03′13″N 3°28′31″W / 51.053723°N 3.4752172°W / 51.053723; -3.4752172 (Wimbleball Reservoir )
21,541,000
1968
1979
87
Winscar
England
South Yorkshire
SE1530002600
53°31′11″N 1°46′15″W / 53.519852°N 1.7707125°W / 53.519852; -1.7707125 (Winscar Reservoir )
8,300,000
1970
[vi]
1975
131
Woodhead
England
Derbyshire
SK0820099400
53°29′28″N 1°52′40″W / 53.491247°N 1.8778781°W / 53.491247; -1.8778781 (Woodhead Reservoir )
4,700,000
1848
1877
38
Wraysbury
England
Surrey
TQ0250074500
51°27′37″N 0°31′34″W / 51.460205°N 0.52600813°W / 51.460205; -0.52600813 (Wraysbury Reservoir )
26,910,000
1945
[vi]
1970
158
Yarrow
[v]
England
Lancashire
SD6240015500
53°38′05″N 2°34′12″W / 53.634662°N 2.5701051°W / 53.634662; -2.5701051 (Yarrow Reservoir )
3,252,000
1850
1877
155
Ystradfellte
Wales
Powys
SN9460017500
51°50′46″N 3°31′53″W / 51.846116°N 3.5314738°W / 51.846116; -3.5314738 (Ystradfellte Reservoir )
3,277,000
1902
[vi]
1914