MASSIVE can of worms this one, hence probably why you may not get too many straight answers!
Some points to kick it off:
Fire Safety Order applies as we know as it's a place of work and service users are unrelated, blah, blah...
There is no formal written national fire safety guidance on supported/assisted living type premises etc. (some fire authorities have had a go)
However do they live and operate like a family unit would?
Is the risk any greater than that of a
comparable domestic bungalow with mum, dad, and 2 kids with disabilities where they can't self evacuate?
Was the Fire Safety Order ever intended to apply to such premises even though it does by virtue that someone is employed? (read the RRO carefully and you will find the answer)
What about same situation.....bungalow with service users, unrelated and a support worker comes in for 3 hours a day to help with dressing, personal care, meals etc. Does the RRO still apply??
The fire service seem to have a big issue over these premises types and you will get huge differences in approach over the Country, some "require" the full shooting match, all doors FD30s including self-closers (which rather nicely stops them moving around their own home) full part 6 interlinked AFD, emergency lighting(!) and while we are there a few fire exit signs and thumb turns on the final exit doors as keys are unacceptable?
There are 1000's of these property types, what did we do with them before 1st October 2006??
Just a starter for 10