BRITISH Transport Police are appealing for help to trace two people who witnessed a man sexually assault a teenager on a train.

The 18-year-old woman was travelling on a c2c train from Southend, bound for Fenchurch Street, when she was sexually assaulted by a man she was travelling with.

Detective Constable Andy Parkinson said “Following the report, we examined CCTV from the train bound for Fenchurch Street and had uncovered images of three witnesses who we believed may have more information about what happened and can help us with our investigation.

"One witness has been ruled out from our enquiries. Officers are still looking to speak with the two men in the CCTV image who they believe can help in the investigations.

"I would like to thank the media and members of the public for their continued help.

"I would urge any witnesses to come forward so we can establish the full circumstances behind this concerning incident.”

The incident took place between 8.55pm and 10.10pm on 12 March 2016.

Anyone with any information should contact British Transport Police on 0800 40 50 40 or text 61016 citing reference 490 of 14/03/2016.

Alternatively, details can also be given to the independent charity Crimestoppers anonymously on 0800 555 111.