DETECTIVES investigating the murder of Christopher Mason have released a CCTV image of the woman they hope can help with their inquiries.

They are hoping to talk to a woman seen talking on her mobile phone close to where Christopher was attacked in Market Street on christmas morning.

The woman appears to be wearing a short skirt with knee-high black boots.

Detective Inspector Mick Hanlon said: "We are determined not to leave any stone unturned and will do all we can to find the person responsible for Christopher's death.

"We know that people were in the street at the time of the attack and that they could hold vital information to assist our investigation."Christopher, 30, was punched in the face on Christmas morning in what police have called an "unprovoked attack".

He fell and hit his head on a brick wall and was taken to hospital with head injuries, but died on New Year's Eve.

Police are hoping to trace a man wearing a gold party hat, also caught on CCTV, and a man riding his bicycle up and down the Market Street.

Anyone with information can telephone 01923 472041 or call Crimestoppers anonymously on 0800 555111.