Darren Brown Lottery Predictions

He has assure everyone that he will reveal how this is done on Friday (Tomorrow) on BBC/C4. I will try to post the youtube of the solution to this as soon as I can find it. Is it fake walls and backdrop? Is it something up his sleeve? Are there tiny video screens on the balls that display the numbers after they are announced? Is it simply camera trickery? Hopefully we will find out so that we can 'do this at home' too.