There's a JSP on the Defence Intranet library which has all the dimensions and fittings required as a minimum for every rank in singlies accommodation. Have to admit that I've not needed to look beyond the singlies pages so far but I'll try and remember to have a look when I get back to work next week.
I had thought that everyone had been brought back in from ERA/SSSA which is why the MQs are filling up with singlies who can't fit into the Messes. Good job we still own lots of accommodation in the areas surrounding our major bases. Oh, sorry I forgot. We don't.