Police are trying to find two men pictured by a phone's security app after it was stolen. The image was emailed to the victim after the device went missing on Monday 25 November.
Detective Constable Graham Hempstead, said: "The victim, a 31-year-old woman, put her phone in her coat pocket and boarded a Northern line train at Clapham South around 7.30am.
"She left the service at Stockwell and boarded a Victoria line train to Oxford Circus, before getting on a Bakerloo line train to Baker Street where she realised her phone was missing.
"We don't know if either of the men pictured are responsible for the theft, but it's clear that one of them had a connection with the phone and I'd like to speak to them about it."