I did the Kilimanjaro climb a few years ago, then the six-day trek to Machu Picchu in Peru so this bike ride to raise money for Great Ormond Street seemed like the next big challenge.

At weekends, I've been going on long but steady-paced four-and-a-half-hour bike rides.

I eat quite healthily normally but, like everyone, have relapses and give in to the odd cake.

I mean, I'm lucky because I've slimmed down, but the last thing I was thinking about was losing weight.

Like a typical Gemini I'm changeable, I can be two different types of people. I can be very outgoing, but sometimes very shy.

Young girls look to me as a role model and think I crash diet to keep slim. That's not true, I always eat properly.

I did like hanging out with all the rock'n'roll boys - it was fun but all those relationships didn't work out.