There is a whole genre of funny travel writers - that's very popular. There's Bill Bryson and people who follow that route and sell travel writing through making people laugh. It's a very difficult group to take. The line between comedy and mockery is sometimes a bit thin.

I wonder if this reason is partly geographical, that talk radio is so much more successful in North America than in Britain? People who are very remote - I'm thinking of Newfoundland - feel very connected though the radio.

American travel writing is very healthy. I'm always flicking through the reviews and I see plenty of travel writing - and an impressive line up and continual demand.

In both places [Paraguay and Newfoundland] people rise despite everything - both are pretty tough environments.

I have to be careful not to visit one place right after the other and write one book after the other. Because I fear writing the same book all over again. That's why I am taking a break and doing something different this time.

I often think I would like to come even closer to home and write about somewhere like Wales, for example - which we in England tend to be a little snooty about. That's where the coal comes from and that sort of thing.

There is a very big difference between American and British travel journalism, and that's this whole business of the assisted or freebie trip. In Britain we are unashamed about any travel company paying for you to go and then writing about it. That's the only way we can do it. But I have tried the same in the States, and I can't write for any sizeable American newspaper because they tell you to do it on this basis.