Clearly it is difficult to comment without more information but I generally find that rather than starting world war 3 it is better to approach the company who carried out the risk assessment for an explanation of their findings.
They should be able to tell you what the standard of compartmentation is- it can vary between purpose built and conversions. It might be that one occupier invited them into their flat and the others did not- they would then perhaps have only been able to comment on what they had seen. Its one area in which in England and Wales whilst the Fire Safety order only applies to the landlords and common areas clearly fire compartmentation between floors could be breached in a localised area only visible from the interior of a flat- ie part of the building not subject to the Order. This is a difficult situation and only really possible to enforce if it constitutes dangerous conditions. Sometimes in blocks of flats this can create major difficulties for the assessor- take for example a service duct for the soil stacks that links flats- it is clearly a common area, though sometimes only accessible from within the flats.
If the assessors are worried about macro detail such as hinges it points towards a level of diligence and possibly competence but of course this needs tempered by a sense of proportion as well. They may say that the hinges were aluminium or had nylon bushes- or on the other hand they could be OTT. Let them justfy their report, give them the chance to provide you with answers then if you are still unsure there are plenty more fish in the sea.
