However, not all historical markers in the United Kingdom are blue, and many are not ceramic. There are commemorative plaque schemes in Bath, Edinburgh, Brighton, Liverpool, Loughton, and elsewhere—some of which differ from the familiar blue plaque. A scheme in Manchester uses color-coded plaques to commemorate figures, with each of the colors corresponding to the person's occupation. The Dead Comics' Society installs blue plaques to commemorate the former residences of well-known comedians, including those of Sid James and John Le Mesurier. In 2003, the London Borough of Southwark started a plaque scheme which included living people in the awards. Even in London, the Westminster City Council runs a green plaque scheme which is run alongside that of the blue plaque scheme administered by English Heritage. Other schemes are run by civic societies, district or town councils, or local history groups, and often operate with different criteria.