This category does not require a rating on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

British Empire This category is within the scope of WikiProject British Empire, a collaborative effort to improve the coverage of British Empire on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.British EmpireWikipedia:WikiProject British EmpireTemplate:WikiProject British EmpireBritish Empire articles Melanesia: Solomon Islands This category is within the scope of WikiProject Melanesia, a collaborative effort to improve the coverage of Melanesia on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MelanesiaWikipedia:WikiProject MelanesiaTemplate:WikiProject MelanesiaMelanesia articles This category is supported by WikiProject Solomon Islands.

I think this does deserve a history sub-cat (currently Category:History of the British Solomon Islands) for 1893 to 1975, but the current structure is both incomplete and repetitive. One option might be abolishing the Years in BSI categories, and just keeping Category:Decades in the British Solomon Islands. The BSI years categories are probably not needed for the British Empire hierarchy, as the SI categories for relevant periods could be placed directly in the British Empire hierarchy; but perhaps the C19 and C20 BSI categories might be usefully kept for the BE hierarchy.

Another option would be to rename the Solomon Islands categories up to 1975 to British Solomon Islands, and removing duplication.

Pinging user:Marcocapelle who may be willing to bring his experience to bear on this hierarchy. – Fayenatic London 04:12, 30 August 2019 (UTC) reply

• @ Fayenatic london: see CfD discussion. I am not sure if that solves all your concerns, but it is at least a start. Marcocapelle ( talk) 13:09, 31 August 2019 (UTC) reply
  • @ Marcocapelle: Thanks, that is indeed a start. Perhaps Category:Years_of_the_20th_century_in_the_British_Solomon_Islands could be added to the nomination? Then the upper categories of the hierarchy would become empty. 1890s to 1960s, and 1970 to 1975, in Solomon Islands could be placed directly in the History of BSI category, and in the relevant British Empire cats. – Fayenatic London 14:11, 31 August 2019 (UTC) reply