Oxford has a slightly mythical rep, particularly for people who haven't been there.

You get pigeonholed. Some people are film stars, and some are theatre stars who do one-off telly. Somehow, I get into long-running series.

You just suddenly think that there's something quite childish about acting. Basically, it's pretending, isn't it? It's good fun and I enjoy it, but it's a funny way of making a living, particularly when you make a very good wage, as I've been fortunate enough to do.

I catch an old 'Morse' on ITV3. I've never thought I looked particularly like my son. He's taller than me and blond. But when I see Lewis walk into a room with John Thaw, it's like my son has just come onto the screen. That's very strange indeed!

For years, particularly with the advent of the Internet, people have been griping about lessening attention spans.

I initially thought 'Lewis' was a terrible idea. The character had very much been Morse's work donkey and sounding board. But I was persuaded to do it, thinking if it was a flop, at least ITV would stop asking me. But the pilot took off, so we got back on this moving train, and we've never looked back.