British Transport Police (BTP) have released an image of a man they want to speak to in connection with a sexual assault on a train.

The incident occurred at around 9am on Tuesday 11 November on a service from Slough to Tottenham Court Road. Officers said a woman was standing in a busy carriage when a man standing behind her sexually assaulted her. He continued the assault even as she tried to move away.

Police believe the man pictured could have information that may assist with their investigation.

Anyone who recognises him is asked to text BTP on 61016 or call 0800 40 50 40, quoting reference 201 of 11 November. Information can also be provided anonymously via Crimestoppers on 0800 555 111.

Image: British Transport Police