Police have launched an investigation into the disappearance of a borough postman last seen outside a Twickenham bank.

James Seabrook, 35, has been missing for almost three weeks and is being treated as a high risk' missing person.

He was last seen outside the NatWest Bank in Twickenham on April 21 at 7.15pm with a male he introduced as Lee who is believed to be from Roehampton.

Police would like to identify this unknown male who is over 6ft, very slim and was wearing a dark jacket, dark trousers and a shirt with horizontal stripes.

James, who is also known as Mario, works as a postman in Richmond and lives at his mother's home in Twickenham. He is 5ft 7ins, of a slight build with short brown hair and was wearing a white shirt, blue jeans and white trainers at the time of his disappearance.

James' sister, Georgina Seabrook, said on behalf of her family: "We are all missing James. We just want to know that he is safe and well."

Police believe the disappearance is totally out of character and anyone with any information should contact Richmond Police on 8247 5866 or The National Missing Person Helpline on Freefone 0500 700 700.