I think that the marketplace has changed in many dramatic ways but actually in some sense it's remained the same because the challenge of creating quality programming is the same, and I've always thought that if you follow the great material everything else will fall in to place.

My career has sort of been characterized by taking advantage of the changes in the marketplace, sometimes by design, sometimes by accident.

One of the things that's different about London and the English market is that theater and film and television are all based in London. It's not quite the same as in the States where if the playwright here wants a successful TV or film career, they're whisked away by Hollywood.

You never know, until you put a play up for an audience, whether it's going to work. Things you think will work don't, and things you're not sure about work really well.

I find it very invigorating having Ken Lonergan, who's an established, Pulitzer-nominated playwright doing Howards End, or Chris Hampton who's won an Oscar writing a TV series, or having an actor like Mark Rylance, who is probably England's leading theater actor, in the lead in Wolf Hall.

When I started producing it was right at the beginning Channel 4 in England. Nicholas Nickelby which was my first credit as a producer was Contract 001 at Channel 4 - that was the start of independent production in England and the emergence of an independent sector.

The play has to work for the super fans, and not speak down to them, and yet it had to play to those people who maybe had never read a Harry Potter book or seen the films.