The 79-year-old boxer who became an unlikely star

He needed a career so he gave up boxing and took up a job as trainee journalist at the Arbroath Guide newspaper.

A long career in sports journalism followed, including working for ITV’s Grampian TV, where the closest he got to a fight was with Sir Alex Ferguson, the notoriously hot-headed manager for Aberdeen in the 1980s.

It was not until decades later, when he was in his late 50s, that Frank, by then a father-of-four, started working out again at his local boxing gym.

“I thought ‘I’ll go to the gym and keep with it’,” he says.

“I felt guilty that I wasn’t doing anything in terms of physical exercise.”

Frank spent the next 15 years consistently working out and staying fit.

“I worked out three times a week, full session, the same as everyone else. I loved it,” he says.

Then three years ago the uppercut video went viral and his hundreds of followers soon became tens of thousands.

“TikTok was like a wildfire,” he says. “Soon we were at 50,000 followers and then 70,000 and I’m thinking ‘this is crazy’.”