Derren Brown; how did he do it?

I watched Derren Brown 'predict' the lottery numbers on TV last night.

I love the stuff he does but I don't think this was much more than an advanced slight of hand (or camera).

It was alleged that he had written the winning numbers on what appeared to be table tennis balls before the draw but crucially they were turned away from the camera's view before the draw.

This was supposedly because the BBC and Camelot would not allow the numbers to be shown in advance of the draw, ho hum.

I don't know how it was done, but I'm fairly sure the numbers were written on the balls after the draw happened (but still with seconds of the numbers being shown).

There was a curious delay whilst Derren was watching the TV screen with a small whiteboard in his hand but did not write the numbers down as drawn; all a little odd. It did make for intriguing telly though.

We are told he will reveal all on Friday night!