I'm taking on Cancer Research UK's Tough 10 - a brand new series of epic 10k runs over some of the UK's toughest terrain. Starting at Castleton in the Peak District, I'll be conquering a 10k course full of punishing long steep inclines along uneven muddy paths. 1 in 2 people born after 1960 will be diagnosed with some form of cancer in their lifetime. So dig deep, and help Cancer Research UK scientists take on their toughest challenge yet - to beat cancer sooner.