Do you recognise this man?

Detectives investigating a sexual assault on board a train are today releasing this CCTV image in connection.

The incident happened around 7.30pm on Monday 4 March.

A man  was travelling to Colchester on the train from London Liverpool Street. He woke up to find a man next to him sexually assaulting him.

Detectives would like to speak to the man in the image who they believe may have information that could help their investigation.

Anyone who recognises him is asked to contact British Transport Police by texting 61016 or by calling 0800 40 50 40 quoting reference number 325 of 5 Ma