Colin was an art expert called in by Roy Cropper through the Weatherfield Historical Society to investigate a large graffiti mural painted overnight on the wall of 4 Coronation Street. Sally Webster was furious about the daubs until Roy mentioned that they might be by Banksy and when she read up on the some prices his "work" fetched, pound signs lit up in her eyes and she dreamed of moving to Hale Barns. The character was credited as "Art Expert" but his name was given in dialogue.