A YOUNG horse training hopeful who had the “attitude and talent to go far in his career” has died in his sleep.

Sean McGuinness, 24, was a graduate of the British Horseracing Authority and had joined Malton-based trainer John Quinn as a pupil assistant last March.

He had also been a winning jockey in Ireland and worked in America.

Mr Quinn paid tribute to his assistant, who was found dead in his bed in North Yorkshire on Wednesday morning and, despite paramedics’ attempts, could not be revived.

He said: “He was a great fella, a really decent lad with a great work ethic and a real team player, and it’s a fierce tragedy for his family.

“He’d been in great form on Tuesday, working away, never complained, and went for a run after tea.

“We’re very sorry for him, racing aside, he was 24-years-old with his life in front of him. I couldn’t speak highly enough of him as a human being and all the lads felt the same.”

Mr Quinn said his thoughts were with Mr McGuinness’ parents, who live in the Blackpool area.

He said: “It's a tragedy to lose your life like that at only 24-years-old. I broke the news to the lads this morning and they were all devastated.

“I feel so sorry for his poor mother and father, especially as he was an only child.”