Martial arts master Jack Hearn, aged 92, is the oldest Judo Sensei in the UK. Jack, from Cramlington, Northumberland, is one of the country’s highest graded players and has practiced the sport for 64 years.

Jack has teamed up with us to encourage Britain’s retirees to try something new and stay active. To give this a kick-start, Jack will be offering five lucky winners the chance to train with him in one of his Judo classes. To enter the free deal to be in with a chance of winning just click the ‘Buy!’ button.

Let us know when you’ve entered on Twitter @Groupon_UK using the hashtag #JudoJack. Alternatively, drop us a comment on our Facebook page.