"but only the forward observer could flown if a torpedo was carried" something missing here
A word or two on the configuration of the cockpits would be useful - you mention the forward observer cockpit but we aren't provided with the positions of the other to compare it with (it isn't clear from the images)
Operational history
"The mission was generally unsuccessful" not sure why "generally" is required here? Were any bombs dropped?
Was Saint-Pol-sur-Mer a military airfield? Probably worth noting
"the following evening" suggest adding the date here because it's been a while since the last was provided
"surprised two cargo ships" to avoid too many pairs
Do we know whether the Dutch WD.11 was the rescue plane or the original craft that made the emergency landing? Might be worth mentioning that saga in a little more detail again here for context
"In service the German pilots found the WD.11 too fragile for the heavy weights that it needed to carry, specially while taking off or landing." needs a citation
The Operators section really needs a citation for the sake of completion