Tyrone Busch stood up and launched the "entirely unprovoked" and "out of the blue" attack on Michael O'Dwyer, 31, outside the Red Lion, in Dereham.

He then sat back down, finished his drink and left, making no attempt to help the victim, a father-of-two, as he lay on the ground.

Busch appeared at Norwich Crown Court on Thursday, where he admitted the manslaughter of Mr O'Dwyer, who was also known as Michael Spooner.

Red Lion pub, Dereham (Image: Newsquest)

The court was told the Mr O'Dwyer did not die at the scene after the attack, on the evening of July 20, but eventually got to his feet and, with the help of friends, went to his home in the town.

However, his condition deteriorated and in the early hours of the following morning a friend........

© Norwich Evening News