Detectives are hunting this man over a fatal attack at Parklife Weekender festival.

Robert Hart, 26, died four days after being punched in front of the main stage in Heaton Park.

The attack came at around 9.15pm on Saturday, after Robert protected his girlfriend from being repeatedly hit with an inflatable toy.

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Robert, from Macclesfield, was punched unconscious and was given CPR at the scene by two off-duty medics.

Police have confirmed he passed away in hospital on Wednesday.

An efit image of the attacker has now been released.

The offender is described as a mixed race male, aged in his late 20s and around 6ft 1in tall.

He has a muscular build and short, dark hair which was shaved at the sides. He was also wearing shorts and a blue, bomber-style jacket with the letter ‘A’ in white on the front.

Det Insp Richard Eales: “Our immediate thoughts go out to Robert’s family and loved ones. We currently have specially trained officers with them to help through this terrible time.

"We are still in the early stages of this investigation, however several witnesses have assisted us with vital information concerning the description of the offender.

"We believe a confrontation took place following an inflatable doll hitting Robert’s girlfriend.

“We are aware other assaults took place in the park that evening , but I am specifically appealing for witnesses who recall seeing the inflatable doll and the attack on Robert immediately thereafter.

"I am keen for those witnesses to come forward and other persons nearby who may have mobile phone footage of the attack or captured an image of the person responsible.

“Finally, if you are the man responsible or were with him that evening, please come forward.”

Anyone with information should contact the incident room directly on 0161 85 69283 or email the incident room on mit.syndicate8@gmp.police.uk with any relevant footage.

Alternatively you can call police on 101 or Crimestoppers, anonymously, on 0800 555 111.