Police have released images of a man they want to speak to in relation to a suspected arson attack on social workers.

The fire happened on December 6 at about 11:15pm in Thornton Road, Carshalton.

A man was seen jumping over a fence at the scene and approaching the back of the building, police said.

A rear window was smashed and a fire started inside the building while the man stayed outside.

The fire caused significant damage to the kitchen and minor smoke damage to other rooms.

The building was unoccupied at the time.

Detectives believe the man may have come from the Middleton Road area and left in the same direction.

He may have suffered injuries or burn damage to his clothing, detectives said.

Anyone who recognises the man in the images should call Sutton Police on 101 or Crimestoppers anonymously on 0800 555 111.