Detectives hunting for a woman missing after a night out have released a CCTV image of a man they are trying to track down in connection with the disappearance.
Fears are growing for Carlie Johnson, 28, from Chelmsford, Essex, who has been missing since late on Friday night.
She had planned to catch a train home from London Liverpool Street after spending the evening at XOYO nightclub in Cowper Street, near Old Street station in the city.
But Essex Police said it is believed she stayed in the capital.
Police have released a CCTV picture of Ms Johnson wearing a cream top and black coat as she walks out of the club with a dark-haired man in a hooded coat.
In a statement, Essex Police said: "Officers want to trace this man as he may be able to help piece together the missing person's movements after this image was captured at 4.12am on Saturday, October 17."
Carlie is described as white, 5ft 8in, with very long, straight brown hair.
She was wearing a long black coat, jacket, sleeveless cream blouse, short black skirt with gold buttons down the side, tights and black high heels. She may also have had flat shoes with her.
Officers said the man in the CCTV footage or anyone who knows who he is should contact police at Chelmsford on 101.
They also appealed for anyone with any information about Ms Johnson's whereabouts to contact them.