They were largely kept in the hangar.I’m pretty sure that none of the personnel rescued by BULW were allowed ‘tween decks. They were “accommodated” on the fo’c’sle, flight deck or in the vehicle hangar, both of which are pretty large. The pictures you can google search show that.
The only time yuo put civvies in cabins etc is when evacuating UK Entitled People in a NEO situation - at which point you cram stow them, and hope none of them get sea sick.
I've never stepped foot on Bulwark so unfamiliar with layout. How many elec sockets you got in various sizes on a T23 though?? Tea urn by the Air office being the primary one...then the rest...