Robert Waller (72) disappeared during a kidney dialysis treatment at the Royal Sussex County Hospital in Brighton on October 7.

He has links with Bognor and Sussex Police has said it is possible he is in West Sussex.

He has not had dialysis for nearly a week and without this he is at high risk of having kidney failure. He also takes medication for heart problems and does not have his medication with him.

Mr Waller, from Hastings, is believed to be using a free bus pass and police have information that he was in Shoreham yesterday (Thursday, October 9). The police has also said the man may be in Worthing.

He is described as white, with short dark hair, of medium to large build. He is about 5ft 9 and wearing a beige fleece, a light or beige checked shirt and pale beige trousers.

Anyone who has information about Mr Waller's whereabouts is asked to contact police on 0845 60 70 999 quoting serial 345 of 7 October.