The woman is said to have been sexually assaulted between Southwark and London Bridge stations on June 30 just before 5pm.

An image has been released of a man who police believe could help with their investigation.

It shows a man walking around in just his shorts, with his hands appearing to be down his pants.

A shirtless man walking in a London Underground station (Image: BTP) Anyone with information is asked to contact British Transport Police by texting 61016 or by calling 0800 40 50 40, quoting reference 500 of 30 June.

Alternatively, contact Crimestoppers anonymously on 0800 555 111.

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