A factory supervisor was spared jail by a crown court for the second time in four-and-a-half years, after he broke the jaw of another man with a single punch on a night out.

Jamie Adams, aged 23, of Glanrhyd, Pwllheli, admitted causing grievous bodily harm to Jamie Ollerenshaw early on November 25 in Pwllheli town centre.

Judge Huw Rees at Caernarfon crown court imposed a twelve months suspended jail term and ordered Adams to undertake rehabilitation, 200 hours unpaid work and pay £1,200 costs.

Judge Rees said Adams had been watching an autumn rugby international.

The judge remarked: "Drunken loutish behaviour like we saw on the CCTV footage is inconsistent with anyone enjoying watching international rugby. But it’s sadly consistent with young men who can’t hold their drink.”

The blow had been “forceful".

Judge Rees declared: "There are plenty of examples this court has heard of single punches causing an end to somebody’s life when they hit the floor.”

The punch could have caused a brain injury.

“What concerns me is you are not a complete stranger to violence,” the judge said to Adams. “It may be four-and-a-half years ago, but you were convicted of affray.”

However, the defendant was ashamed and now held a responsible job.

Prosecuting counsel Richard Edwards said Mr Ollerenshaw recalled being in the town centre.

“The next thing he remembers is waking up in hospital, clearly injured, with his mother telling him he had been assaulted,” the barrister said. He’d been helped by police officers in the street until the ambulance service arrived.

The teenager needed five stitches, a tooth was removed and a metal plate inserted in his jaw at Ysbyty Glan Clwyd. He’d been in great pain and off work for six weeks.

Elen Owen, defending, said everyone had been drunk and Adams claimed he lashed out in response to a comment. He was “extremely sorry.”

The court heard he’d had a “bad” year, separating from his girlfriend and his mum being assaulted by a stranger.