The "Responsible Person" under the RR(FS)O is always the employer where there is one. In this case, each separate employer within the office block should do their own FRA. Each should also co-operate with and talk to the others. The common areas will probably be covered by each separate company anyway if they form a part of their means of escape but the landlord may also have a responsibility here. It will depend on the exact layout and arrangement of the premises and on who has the maintenance responsibility under the lease. As for the single means of escape. This may actually be pefectly OK in a low risk premises where the occupancy isn't that high. It will depend on the FRA.

The tenent of each part of the building is responsible for the FRA and the landlord is responsible for the public areas (ie outside the office) In practice the tenent should also take account of the public areas as they may well have an impact upon the escape routes available to his staff. There needs to be close cooperation between the landlord and the tenent to ensure the FRA is adequate and covers any aspect that can affect his operation. That often meens cooperateing with other tenents as well. It is not a stand alone thing as you need to take account of how other employers activity can affect your business. Better to arrange to meet with all tenents and the landlord to agree an action plan.

Bob Thanks, I stand corrected. Clearly I don't do FRAs as a rule!