As part of his preparation for a US run of a show called "Secrets", Derren is testing the material under a series of "Underground" shows beneath Charing Cross station. It's a much smaller venue than normal and the show isn't being as loudly advertised as normal; I found out about it on his twitter. It's like a mega-mix of some of his previous shows reworked into a great 2-hour show that'll do well I reckon. Based on the reactions of the audience tonight it doesn't need much improving, I just wish I could see how an American audience would respond to it haha!
This show runs for another couple of weeks and some tickets are released at 1730 for walk ins. A nice tout beating idea.