How did Derren predict the Lottery results?

Last night, live at 22:35 on Channel 4, E4, Film Four... basically every channel with 4 on the end, Derren Brown successfully predicted the results of the UK National Lottery as part of a new mini-series called 'The Event'

Now of course he didn't, that is impossible. He didn't reveal the numbers until after the draw so the trick was that in real-time he got the lottery number to display on to six blank white balls which were in shot with him on screen for the whole time during the lottery draw.

So, how it worked. Derren walks in to a big, open, empty room with a camera man. Also in the room is the six balls on a stand which appeared to be transparent and a TV which showed the live draw from the BBC as it happened. Once the draw was complete Derren rotated the balls in the stand to show that the numbers on the balls matched those just randomly selected in the live lottery draw.

So, how did he do it?

The Theories
1. People are saying the left hand-side of the screen is static and someone just replaces the balls.
But what about the shaky camera?
a) there is an identical room and the motion on the two cameras is tracked and duplicated
b) the camera shake is a digital manipulation of the footage

WRONG: It's a hand held camera, you see the camera man and there's no point where they could smoothly make the transition between hand held and a tracked rig and no rig is visible in the long shot.

2. Remember Derren's show The System where he spent the whole day tossing a coin until he got ten 'heads' in a row. In last night's show Derren mentions that this is the result of a year's work so some people are suggesting he filmed every possible out come.

WRONG: Do the maths, there are 13,983,816 possible combinations, there is only 525,948 minutes in a year.

3. A common explanation is that the balls had some kind of LED lights built in or that the numbers were projected on to the balls.

WRONG: You can't project a dark area on to a white ball with any kind of light or projector, the whole area was too well lit.

4. The numbers were printed on to the balls. Most people are suggesting some king of ink jet printer built in to the stand.

POSSIBLE: But I think the technique is slightly out of goose. As chum of mine Scofield said, you could have a printer in the base of the tray which prints the numbers and then rotated them 90 degrees upwards ready for Derren to reveal... that could work.
Another possible adaption of these technique is to use some kind of light sensitive ink or a thermal printing technique. He could have coated the balls in a thermal ink, similar to the way supermarket receipts work (to see what I mean hold a lighter under a receipt and watch it change black).

In the same way you can project an image on to a TV screen with a beam of electrons, could a similar technique have been used to print on the balls? Some kind of laser or invisible EM beam which would heat or react with the coating on the balls to turn the black.

This is the most likely explanation for me but I'm still not really happy with this theory as the numbers on balls aren't neatly lined up in the tray as you would expect them to be, but then they could have been displaced when Derren spun the tray around to show us.

Cameras
Derren made a point of telling us that there are two cameras, a handheld one and fixed long shot. However, they only ever use the long shot was only used once. This could be part of the misdirection. Either the long shot was only there so we could be shown (or made to believe) that the other camera was hand held or it was there to film how the trick is really done ready for tomorrow night's reveal.

My Conclusion
I don't how he did this trick is important as clearly it is impossible to predict the winning lottery numbers. I think the important question is why did he trick us? What is this leading to? I think we're possibly overlooking something really simple here.

Derren will put our minds to rest on a show tomorrow night at 9pm called 'How To Win the Lottery'.