Police have released a CCTV image of a man they would like to speak to after a woman was sexually assaulted on a DLR train.
The victim was on the platform at Canary Wharf at around 10.30pm on Friday, May 29, when a man began to sexually harass her.
He then boarded the train and sat next to her, British Transport Police said.
She tried to move away but he grabbed onto her and sexually assaulted her, refusing to let her go, the force said.
The man only stopped when two other passengers came over to help and he eventually got off the train at King George V station.
Police have released an image of a man they would like to speak to, as they believe he 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 153 of 2 June.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
