A railway passenger broke a woman’s sunglasses when he approached her on the platform and punched her violently in the head for no apparent reason.

The assault took place on Tuesday, August 13, on platform five for the westbound London overground trains to Richmond and Clapham Junction at Willesden Junction Station in Willesden.

British Transport Police have issued a still from a station CCTV camera in the hope a member of the public will recognise a man they would like to speak to in connection with the investigation.

PC Roy Ward, the investigating officer, said: “The victim, a 23-year-old woman from Brent, was waiting at Willesden Junction station on platform five around 1.45pm.

“As a man walked past the victim, he suddenly turned around and punched her in the head, causing the victim’s sunglasses to break.

“The man then calmly walked away from the woman towards platform four and on to a train (the 1.46pm London overground service to Stratford).

“Luckily the victim was not left with any visible injuries, but this was a shocking and unprovoked assault.

“We do not tolerate violence like this anywhere on the rail network and I’d urge anyone who may have witnessed what took place, to come forward and assist officers in this investigation.”

* Call British Transport Police on 0800 40 50 40 quoting background reference B5/LNA of 13/09/2013 or Crimestoppers anonymously on 0800 555 111.