"Caution - fire alarm may not contain fire alarm "This crap might wash
in the USA, but I'd be interested to know what a UK trading standards
officer makes of it.
They're not. Enforcement is only really going to come into play when
work is inspected re building warrants.The problem might come if someone
burns to death, and you are found to have been negligent - there might
be a case for your refusal to comply ...