A frail elderly man has been left traumatised after his arm was fractured in an unprovoked assault while in the queue at a busy supermarket in Pinner.

Six weeks on and the vicious attack at the Bridge Street Lidl remains unsolved despite a shop full of potential witnesses.

Harrow councillors James Bond, in whose Headstone North ward the victim lives, and Norman Stevenson, who represents Pinner, took to the pavement outside the supermarket entrance last Saturday to highlight the crime.

The pair handed out leaflets to shop customers and other passers by in an attempt to jog the memories, or prick the consciences of those who may know something but so far have not come forward to give evidence or information about the assault on Saturday, March 5, at around 12.40pm that could lead to an arrest.

Cllr Bond said: "Everyone we spoke to is appalled that this attack happened and are very concerned that on a busy Saturday lunch time in a popular supermarket that would have been heaving with people, the person who did this appears to be getting away with it.

"In addition to the availability of supermarket CCTV footage information has come my way that the person who assaulted my constituent then paid for his shopping with a bank card, which means it would be a lot easier to trace him, but worst of all the Lidl security staff just stood aside and let this man leave the shop."

During the assault the 77-year-old victim fell to the floor after being punched which resulted in a fractured arm, lacerations to his head and severe bruising.

Cllr Bond said he has been left traumatised by the experience and his family and friends are mystified as to why the man who is responsible is still at large.

The elderly man had indicated that he wished to leave the checkout queue so he could replace a leaking milk carton when the attack occurred.

Police were called by the London Ambulance Service at 13.48pm and he was taken to a north London hospital for treatment to multiple fractures to his left arm. He has since been discharged.

The suspect is described as a white man, aged between 30-40 years-old, approximately 6ft tall, of a stocky build and had a bald head.

Police said no arrests have been made and enquires continue.

Laura Hamlin, spokesman for Lidl, said: "I can confirm that the emergency services were notified by a Lidl employee immediately following the incident, and we continue to provide full support to the police in their investigation."

Anyone with any information is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.