Earlier this year, my girlfriend's 4-year-old nephew was diagnosed with an aggressive form of cancer. It has staggered me how quickly and ruthlessly it has been and I am astonished by the strength that a 4-year-old and his family have had to muster to make it from day to day to continue the fight and never give up.

Cancer is cruel and relentless and I want to raise awareness and help fund the support that is so desperately needed.

My endurance adventures will include:

* Cycling 100km from my house to the top of Tourmalet, running to the top of Pic du Midi de Bigorre and then cycling home all in the daylight of the year's longest day.

* Running the 120km trail around Andorra

* Running 16 marathons in 14 days so I can reach "500 marathon milestone" in just one decade.

About the Charity:

When a child is diagnosed with cancer life becomes full of fear, for them and their family. Fear of treatment, but also of families being torn apart, overwhelming money worries, of having nowhere to turn, no one to talk to.

At Young Lives vs Cancer, we help families find the strength to face whatever cancer throws at them. But every day 12 more children and young people hear the devastating news they have cancer. We’ll face it all together – but we can’t do it without you.

To find out more visit www.younglivesvscancer.org.uk