Question: Now, Mike, that's all very well, but on the other hand you also have to deal with the pressures of the audience for this franchise, which can be very, very critical, how mindful were you of that?

Newell: Well quite, and then, you know, as things progressed more and more... I mean for instance quite recently, I saw a piece that appeared n a chatroom that was, was outraged that we had changed Hermione's ball dress from the blue of the novel to the pink of, of the film. Outraged! And a very, very lively and tense chatroom discussion sprang off that. Now I knew about that to start with, I knew that there was an audience that was rabid to a degree, and that we of course could not disappoint them.

Question: Would you ever be persuaded to go back to Potter again?

Newell: Oh, yeah - you know, I think when it comes to the last one there'll be queue a mile long. I'll certainly be there.

"I very clearly remember that within a couple of months of starting work I was intensely angered by the lack of money, that there wasn't enough money to make the film properly and that really ****** me off," Newell told Reuters.

He gave the example of the effects-laden opening scene, set at the Quidditch World Cup, which was the subject of heated debate among filmmakers and producers.

Eventually he argued successfully for its inclusion, saying that without it Potter fans would feel short-changed

"I'm going to go to university. I don't know what I'm going to study yet, but I think this business is such a temperamental one; one minute you're up there and the next -- nothing." [Emma Watson]