A woman sexually assaulted a man on a Tube station escalator.

At around 9pm on April 14, a man was travelling on the escalator at Euston Underground Station when a woman tried to link arms with him.

"When he pulled his arm away, she sexually assaulted him," British Transport Police (BTP) said.

The woman, who was travelling with a friend, then left the escalator and boarded a Tube train.

Officers would like to speak to the woman in the image, as they believe she has information which may assist the investigation.

Anyone with information should contact BTP by calling 0800 40 50 40 or texting 61016 with reference 450 of 15 April.

Alternatively you can contact Crimestoppers anonymously on 0800 555 111.