A stranger has admitted killing a charity fundraiser who died from a single punch while he was out celebrating his third anniversary with his girlfriend.
Nathaniel Bierley had been in Nottingham city centre when he was attacked by Kyle Turton, 21, in the early hours of 5 March.
The 26-year-old, who was well known for raising money for diabetes charities, was left with serious head injuries.
The popular Five Guys worker was rushed to hospital but died nearly two weeks later on 17 March as a result of his injuries.
On Friday, Turton, of Clifton in Nottingham, admitted manslaughter when he appeared at Nottingham Crown Court. He was remanded in custody and will be sentenced on 8 July.
Read more: ‘Dad was dead in seconds’: Why this Tory MP is trying to change the law on one-punch assaults (from February 2021)
A 17-year-old boy also pleaded guilty to affray on Friday and was released on conditional bail to next appear at Nottingham Youth Court on Wednesday.
In a tribute, Mr Bierley's sister Louisa said: “None of us can even begin to get our heads around what has happened. Nathaniel was taken way before his time and he still had so much more life in him.
“He worked at Five Guys and was just about to get his own store to run, but he loved life and was always looking for a new adventure or a new place to visit.
“I think his favourite ever memory was when he travelled to India in 2016 and did an overnight marathon - he was even hoping to return to India later this year. You could never tell Nathaniel he couldn't do anything as it just pushed him to work harder.
“I remember one time he ran the Nottingham Robin Hood Marathon after not training for months and everyone was telling him to just miss it that year, but he wasn't having it. I just remember him being so proud of himself when he crossed the finish line.
“He will be so sadly missed by everyone that knew him.”
His family is now hoping to raise money in his memory, including through a charity football match next month, to donate to Headway, a charity aimed at improving people's lives after a brain injury.
“He was always raising money for charities such as the Juvenile Diabetes Research Foundation as he had type 1 diabetes," Ms Bierley said. "He didn't let it affect him though, he just wanted it to push himself further.
“Now it only feels right we carry on doing all the things he loved to do for him and try, and make this world a better place.
“If we can even just help out a few people with Nathaniel in our hearts that's enough for us."