Martin Roberts visits Clapham, south London to see an impressive large house, over four floors, offering great development potential. He's also in Barnsley, South Yorkshire to visit a two-bed mid-terrace, with an interesting colour palette, and a new owner who hasn't even looked round the place yet. Martel Maxwell heads to Crewe, Cheshire, to see a 1930s three-bed semi, that needs bringing up to date.