Gardening is, apart from having children, the most rewarding thing in life

I get up to 400 letters a week, so I have a full-time PA, but I try to answer everything. People don't seem to realise that if they send something living in the post it's going to die on the way. Especially when you wrap it in a polythene bag.

I never get bored of my wife. It's lovely.

It's never much fun at school - it's just dates. Then as you get older, for some reason, you get more interested.

I was very inventive. I lived in my own world - my dad said I was a loner. Not lonely, just happy in my own company. It's the same now. I need time alone, which is maybe why I love to write. Having said that, I love the sociability of telly. It's a nice contrast.

I wish we could grow up about it, I'm sure we are contributing to global warming, and we must do all we can to reduce that, but our climate has always changed. The Romans had vineyards in Yorkshire. We're all on this bandwagon of 'Ban the 4x4 in Fulham'. Why didn't we have global warming during the Industrial Revolution? In those days you couldn't have seen across the street for all the carbon emissions and the crap coming out of the chimneys.

Don't overdo the booze especially while flying - just because it's there doesn't mean you need to drink it. Everything in moderation.