Police are hunting a man who allegedly sexually assaulted a woman with arthritis after coming to her aid at a central London Tube station.

A woman aged in her 40s was struggling to walk in a passageway at Marble Arch station when she was approached by a man, who helped her onto the platform.

He sat with her on a bench and started making inappropriate comments towards her.

He then began touching her inappropriately and trying to kiss her until a member of rail staff intervened, police said.

The offender left on a Westbound service.

CCTV has been released of a man police want to speak to after the incident on February 23 at about 3.25pm.

Investigating officer, Det Con Andrew Parkinson, said: “The woman was very frightened during this incident before a member of staff came to her aid.

“We have been making enquiries since the incident occurred and are now releasing CCTV images of a man we would like to speak to as he may have information which could help the investigation.”

Anyone who has any information which could help with the appeal, please call BTP on 0800 40 50 40 or text 61016, quoting reference number 427 23/02/17.