Michael Crawford

I really didn't realise until I got back the work that goes into a performance. You're like an athlete - if you haven't been practising things tighten up. I had to do a lot of practice work, but I got through it. Even when I was 21 I would have a 40-minute nap on the day of a show, and I will still do that.

In 2004, I was on the West End stage in The Woman In White, and for every show I had to climb into a fat suit to play the obese Count Fosco. It was hard work, and unbearably hot, but I sailed through because I'd always kept myself fit.

To ask questions can become the laziest and wobbliest occupation of a mind, but when you must yourself answer the problem that you have posed, you will meditate your question with care and frame it with precision.