Police have launched an appeal for witnesses after a female rail worker was assaulted, suspecting a man who "urinated" near her staff office.

The woman was assaulted after she and her male colleague challenged a man who had reportedly urinated at the end of platforms nine and ten of Stratford Regional Railway Station, British Transport Police (BTP) said.

This incident took place on Sunday (November 12) at around 11pm.

After challenging him, the man followed the railway staff into the office and the woman was assaulted, BTP added.

The suspect is described as white, of medium build, around 5ft 8" and thought to be in his 40s.

RELATED NEWS - Upton Park fatal stabbing: No action against arrested man

The suspect was also accompanied by a woman, described by police as Asian.

Anyone with information about this incident is asked to contact BTP by calling 0800405040 or texting 61016, with reference 708 of 12 November.

Or, you can call Crimestoppers anonymously on 0800 555 111.