I'm not entirely sure, to be honest with you. I spent seven years with a theatre company that I set up, and then toured around Britain for a long time.

I then became an actor in a museum - the Museum of the Moving Image - so I had to be various film characters, a Hollywood director from the 1930s, a Russian filmmaker from the 1920s and all this kind of thing. It was great fun. I have used my voice in various fictional and BBC productions, so it just came naturally and it's very nice of them to offer this to me.