A good subject following recent events!
The requirement of the Fire Safety Order is to provide a suitable means of giving warning in the event of fire "to the extent that is necessary" as identified by the risk assessment. The responsible person must safeguard the safety of relevant persons, so, if there is no detection in the individual room, how is this achieved?
Smoke alarms actuate the alarm earlier therefore giving early warniong and potentially allowing the occupants to escape. By having a heat detector, I would assume that you are prepared to sacrifice the occupants to warn others ...... not acceptable.
The fire safety guide to risk assesment for sleeping accomodation clearly states that if the premises is being used as a hotel, then an L1 system should be in place.
The Fire Authority can get the system upgraded ...... by use of an enforcement notice if necessary. This can be reinforced by the appeal made by Sparrow Hawk Hotel in Lancashire against their notice, which they lost and the judge made reference to the guidance documents.