This shocking footage shows the savage moment a drunken thug knocked out an innocent passerby with one punch and left him for dead in a shocking unprovoked attack.

Nine men and a woman can be seen circling Alan Bunce, 33, before three of them attacked him in in Grimsby, North Lincolnshire.

Kyle Thornton, 23, jabbed Mr Bunce in the face at 6am after a night out.

Shocking: Footage shows the savage moment a drunken thug knocked out an innocent passerby with one punch in an appalling unprovoked attack

Aiden Hidderley, 23, then came from the side and punched him in the face so hard that he instantly crashed to the ground.

Tobias Nicholson, 21, then punched him on the ground before the three walked away with their friends.

By the end of the attack, the female, who initially pushed Mr Bunce, appears to be ushering her friends away.

The attack in Old Market Place on April 23 was captured on CCTV cameras and was shown at Grimsby Crown Court.

Tobias Nicholson, 21, Aiden Hidderley, 23, Kyle Thornton, 23, were jailed.

After watching the horrific footage, Recorder Rachael Harrison said their violence towards the fitter fabricator was 'extraordinarily cowardly'.

Aggression: Nine men and a woman can be seen circling Alan Bunce before three of them begin to assault him in in Grimsby, North Lincolnshire

Savage: The man who punched Mr Bunce can be seen marching up to him with his fist clenched

Mr Bunce had been walking through town after a night out.

He later required four metal plates in his lower jaw and has suffered trauma and nightmares after the attack.

Recorder Harrison said: 'Thankfully members of the public assisted and put Mr Bunce in the recovery position.'

She added the effects on him had been 'catastrophic'.

Sentencing the trio, she said they had walked away from an unconscious Mr Bunce and had not been shocked by what they did.

She added: 'He had the misfortune to run into you. He posed no threat to you.'

Hidderley and Nicholson, both of of Grimsby, admitted causing grievous bodily harm.

They were locked up for 18 months.

Thornton, also of Grimsby, admitted affray and was jailed for 14 months.

Prosecuting, Jeremy Evans said members of the public gave emergency First Aid prior to the arrival of the ambulance service.

Provoked: One man began the attack at 6am on April 23 by jabbing Mr Bunce in the face

Down: The group of drunk revellers kicked Mr Bunce when he was on the floor

He said there had been trouble on a nearby street earlier which was captured on CCTV.

A short time later the cameras identified Thornton, Hidderley and Nicholson attacking Mr Bunce.

Mr Evans said: 'He had nothing to do with the clash on Bethlehem Street.'

He said Mr Bunce was punched unconscious by Hidderley and fell to the ground.

Nicholson was then seen to punch him when he was unconscious on the ground.

He later spent three nights in hospital and required two operations on his lower jaw, including the insertion of four metal plates.

He was only able to consume liquidised food and has been unable to eat steak since.

In his victim impact statement he told how he suffered nightmares and calls out in his sleep, disturbing his partner.

The attack in Old Market Place, was captured on CCTV cameras and was shown at Grimsby Crown Court

He also complained he suffered financially being off work for four weeks and went into debt.

Mr Bunce said he had been forced to carry out extra hours to cover his debts and that had caused additional pain in his jaw.

For Hidderley, Stephen Robinson said: 'He cannot believe that he behaved in the way he did. It could have been even worse.'

He said his client had consumed a lot of alcohol.

For Nicholson, Andrew Bailey said his client was ashamed and remorseful.

For Thornton, Saleem Khan said his client did not minimise his responsibility.