Detectives have released this e-fit of the knife-wielding stranger wanted in connection with the random stabbing of Philip Hey.

“He had dark, piercing eyes and very distinctive wavy hair cut straight across at the front and just over the ears.

“I keep forcing myself to remember his face,” Mr Hey said.

Detective Chief Inspector Jon Morgan, of the Homicide and Major Enquiry Team, is leading the investigation and said: “Numerous enquiries have been made to trace the individual responsible for this shocking crime.

“He is described as white, around 20 years old, six feet tall, of thin build and wearing a distinctive, patterned woollen jumper.”

Mr Hey added that the jumper had dark diamonds of colour on the front.

“I am particularly interested in speaking to anyone who saw a man fitting this description, shining a laser pen in the local area around this time.

“Likewise, I am keen to identify three men seen walking past the Fisherman’s pub at 10.30pm that same evening and away from Wagon Lane.

“Each is described as white, of slim build with short hair. One of these men, wearing a puffer style jacket was also carrying a chair.

“It is important that we speak to them, as they may be able to assist in our enquiries and draw together the facts we need.

“We know that there had been a Christmas party taking place at the Bingley Rugby Club on the evening in question and someone from this event may have seen the men fitting these descriptions.

“Thankfully, the victim is now out of hospital and I am calling on the community to help him receive the justice he deserves.

“If you have any information or can identify the man in the e-fit, please call us immediately on the non emergency number 101 or Crimestoppers in confidence on 0800 555 111."