The notion that the staging of the play Harry Potter should be raw magic and street theater rather than high-tech theater, was essential.

I live in New York, so I'm used to the audiences that cheer and clap through a play. It is unusual for London audiences.

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.

I think where Playground is heading is deeper into that marriage between stage, film and television, with the increasing number of people in the film business working in television, obviously something that we were very influential in starting and doing at HBO. And I think that that's the focus of where I see the company moving forward, continuing to explore that intersection of all that talent.

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.

If the play works in an emotional and engaging way purely from what's on the page, then what's on the stage will be the icing on the cake. If the play didn't work as a play on its own terms, none of the magic, none of the special effects or theatricality of it all, would add up to anything.

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.