Police have issued an appeal for help as they search for a missing 83-year-old man from Letchworth.

William Gordon Whitfield from Western Close went missing from his home at 4pm on Monday afternoon.

He was last seen wearing dark jogging bottoms and a grey short-sleeved polo neck sweater with a blue collar.

William has dementia and police, who issued the alert just before 2am, say there are obvious concerns for his welfare.

Anyone who sees William or anyone who knows of his whereabouts is asked to contact police via the non-emergency number 101.