Police are hunting for a man after a woman was sexually assaulted at a City Tube station.
British Transport Police said the attack happened last summer at Moorgate Tube station.
A CCTV image has now been released, five months after the alleged attack on August 21 last year.
The shaven-headed man is seen in the image standing on a Tube carriage while holding a mobile phone.
He is wearing dark trousers, a sleeveless hooded top, and he has a distinctive necklace draped around his neck.
“Officers investigating a sexual assault at Moorgate underground station are today releasing this image in connection”, BTP said in a statement.
“At around 11.15am on 21 August, a man sexually assaulted a woman on the Northern line platform.
“Officers would like to speak to the man pictured as they believe he may have information which could help with their investigation.
“Anyone who recognises him is asked to contact BTP by texting 61016 or by calling 0800 40 50 40, quoting reference 675 of 21 August.
“Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.”