Ah the tramlines of labels never die do they. The old ones are the best. Happily fire does not know or care what we call premises. What really matters therefore is the level of risk. Sorry to bore people with hard facts and proper research, which I know is less dramatic than emotional claptrap and totally ignoring what the poor chap said in the first instance that this is simply a block of flats. In some areas of the country, including that in which Retty Towers is located, there are serious social problems associated with flat dwellers but we dont ask for all the over the top measures discussed above. The LD1 system and good solid self closing doors is absolutely fine, and the risk assesor would be squandering money for which one day liability will arise when people go way over the top, by asking for excessive measures. It has been shown statistically that the risk to occupants of a shared student house (or in this case a flat) is no different to the risk in a single family dwelling-FACT!!! regardless of what subjective junk one might sling at students. As for going against guidance, BS 5839-6 says all of this, and would only ask for the detection specified for a single family flat, but these people have the benefit of the addtional AFD and the self closers that would not now be needed in a single family flat. (The doors though are not as suggested in the first question FD 30 if they have no strips. But who cares?)