Police are appealing for help in tracing a vulnerable man who has previously been found in Dover when he has gone missing.

In the latest incident, John Walker, 53, has been missing from Islington since Wednesday November 7.

He is described as white, approximately five feet six inches tall, of slim build, with balding grey hair. It is not known what clothing he was wearing at the time of his disappearance.

Anyone who has seen Mr Walker or knows of his whereabouts should not approach him but call Islington Police on 07595 004082, 020 7421 09331 or Missing People on 0500 700 700.