In temperament the Clumber is calm, affectionate and steady, often reserved with strangers but rarely sharp. It has a reputation for a sense of humour and for carrying objects in its mouth. The Kennel Club's standard prefers lemon markings over orange, and the breed appears on the Kennel Club's list of vulnerable native breeds owing to low registrations.
The head is large and square, with a heavy brow, deep-set amber eyes and a broad muzzle. The coat is dense, straight and silky, mainly white with lemon or orange markings, usually on the head and ears, and feathering on the legs. Its gait has a distinctive gentle roll.
The Clumber Spaniel moved from the kennels of the great estates to the show ring in the nineteenth century, appearing at some of the early British dog shows. It also attracted royal interest: Prince Albert and his son, later King Edward, both kept the breed, the latter at Sandringham. In America it was among the first breeds recognised by the American Kennel Club in the eighteen-eighties. Bred to work steadily through thick undergrowth, flushing birds and retrieving them for the gun, the Clumber is long and low, with heavy bone and a broad, deep chest.