Never depend on those luck moments – they are gifts – but instead always build your own back-up plan.

I joined the Army at 19 as a soldier and spent about four and a half years with them. Then I broke my back in a freefall parachuting accident and spent a year in rehabilitation back in the U.K.

There's no magic to running far or climbing Everest. Endurance is mental strength. It's all about heart.

My Christian faith is my backbone

Unless you have shelter, fire is going to be very hard and if you have fire, but no water, you're going to die. They're all super important.

I think viewers quite like it when I'm suffering or eating or drinking something horrible or really up against it in some quicksand or whatever.

That feeling when you're so cold you'd give anything to be warm - I've had it before, literally huddled around a candle flame on an ice sheet.