I hired a building surveyor - Bruce Gray who owns Grays Building Consultants (Tunbridge Wells) to provide a comprehensive building survey on a three bedroom flat I was purchasing in a 1890's Georgian mansion. In my experience the building survey grossly underestimated the extent of dampness and mould in the flat and the remedial actions needed to fix the problem - as two of the three bedrooms are unliveable. It is costing around £10,000 to treat and extract the mould and make the flat habitable. In my personal opinion this constitutes professional negligence on the surveyor's part. I formally complained to Grays Building Consultants and Bruce Gray carried out a formal investigation and found no wrongdoing by himself/his company! I am now pursuing my complaint with RICS.