I'm terrified of walking into a room full of people. Sitting down at a dinner table with 15 strangers brings me out in a sweat.

My faith isn't very churchy, it's a pretty personal, intimate thing and has been a huge source of strength in moments of life and death.

Above all, I feel a quiet pride that for the rest of my days I can look at myself in the mirror and know that once upon a time I was good enough. Good enough to call myself a member of the SAS. Some things don’t have a price tag.

Survival requires us to leave our prejudices at home. It's about doing whatever it takes - and ultimately those with the biggest heart will win.

The appeal of the wild for me is its unpredictability. You have to develop an awareness, react fast, be resourceful and come up with a plan and act on it.

I find skydiving really hard. I broke my back while skydiving when I was in the military, and for 18 months all my nightmares were about falling.

Are you the sort of person who can turn around when you have nothing left, and find that little bit extra inside you to keep going, or do you sag and wilt with exhaustion? It is a mental game, and it is hard to tell how people will react until they are squeezed.