If the building occupiers have doubts about the existing fire safety provisions in a building then something has gone wrong somewhere. That is not to say that this situation is unusual.
Building occupiers have to have information passed to them by the developers under the Building Regs explaining how the fire safety provisions work, etc. But this information is often inadequate.
In older buildings it is not uncommon for the building occupiers or managers to change and for information on the fire safety provisions to be lost in the transfer.
There are a number of ways in which the occupiers can find themselves short of fire safety information. In such a case, who better is there to ask than the person doing the fire risk assessment?
Indeed, the fire risk assessor has to judge the building that he or she inspects against some standard and so has to know what fire safety measures should be in place. This knowledge can either come from a fire strategy (or similar) or, if no such documentation is available, from a knowledge of what would normally be required in such a building. Therefore, the fire risk assessor has to know what should be provided anyway, so why not share that knowledge with the client?
A fire risk assessor could, especially with a new building, assume that the building has been built to a code compliant standard and just look for faults or issues with fire safety management and use of the building. And most of the time the fire risk assessor would get away with it. But we all know that buildings rarely fully comply with guidance so, without some documentation such as a fire strategy justifying any deviation there might be, I would say that it is the fire risk assessor's duty to look, to an appropriate degree, at the suitability of the design and construction of the building to meet the requirements of the legislation under which the assessment is being carried out.