A man is wanted by British Transport Police in connection of a sexual assault on a teenage boy on the London Underground.

Officers have released an image of the man they would like to identify who was wearing a black shirt, light brown trousers and a black rucksack.

They believe the man in the image may have information which could help their investigation.

The incident took place on Wednesday, August 28, at around 6.30pm.

The victim, a 15-year-old boy, was sexually assaulted by the man on two occasions on the Central Line between Stratford and Leyton.

The man then followed the victim off the train at Leyton and tried to engage him in sexual conversation.

If you recognise him, or witnessed what happened, you can contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 640 of 28/08/19.

Alternatively you can call Crimestoppers anonymously on 0800 555 111.