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 love Chatsworth, Winchester Cathedral, Edinburgh Castle... Every time I'm in the vicinity of something old and worth looking at, I try to go. You don't even have to leave your home town to see some places. How many Londoners have seen the crown jewels? Not many, and they'll blow you away, I promise.

I'm a big fan of the Queen. She carries herself well, as does the Prince of Wales, despite getting lots of stick.

Airports - they're not my idea of fun at all. Some of the staff are lovely, but you do always get one or two that seem to forget that it's actually costing you a lot of money to be there and be insulted by their surliness. Times have obviously changed and we need to get used to being more strictly vetted, but they could be more pleasant about it. A smile wouldn't go amiss.

At school I was called Fred, which is my middle name. At that time, Fred was considered to be a bit of a horrible name, so that's why. Otherwise, I was called Titchy because I was little. I was still only about 4ft something when I left school. I grew a foot under glass in my first year as a gardener. It's really quite amazing what sun and manure can do.

Once I was on a plane and a woman said to me, 'Now, what's the matter with my tomatoes?' And I said, 'Well, it's a bit difficult to see from here.' She took offence and said, 'I was only trying to be friendly.'

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.