Sorry to throw a spanner is the works but my questions would be:
1. Are the apartments built as fire tight cells to 30 or 60 mins i.e. concrete walls floors and fire doors to each apartment? If so then is the common area required to be a “true protected route” as in the event of a fire in one apartment the building would be designed for all other occupants to stay put.
2. What would ignite the wood panelling in the common areas? If there are no ignition sources (as it should be a sterile area) and as above it is not in the true sense an escape route, why remove or treat it with flame retardant materials?
3. With regard to emergency lighting, was is the risk that a fire within any apartment will affect the normal lighting to the common area? And again if not an escape route and persons are staying put is emergency lighting needed at all? I agree though if in place I would not recommend it to be removed.
4. Fire exit signage would be unlikely to be required for the same reasons as above, particularly if the route from the block is via a single staircase.