We live in a converted chapel with only two flats one leasehold us and the other is the freeholder who owns the ground floor flat. We are in the process of selling our leasehold flat and have received a section 20 saying they are wanting a fire risk assessment done and also inspections of the gabel end cladding to the front of the building. Reason is because the building insurance says that it has to be wood on brick with no infill. We paid our half of the building insurance in may and was not told of any issues regarding it. We are no worried about our sale being able to continue. We probably thinking October was going to be exchange and complete. Is there anything we can do as our buyers lender won't approve the mortgage while this is going on.