ITV has a approved a Thunderbirds show, entitled "Thunderbirds Are Go!". It'll be produced by NZ's Pukeko Films and the special effects will come from the WETA Workshop. I've heard that the co-owner of Pukeko Films and WETA Workshop, Richard Taylor, is a really big fan of Thunderbirds in the first place. My main concern is that the shows will be only 30 minutes long; Sir Lew Grade's inistence that Thunderbirds be an hour long is partly what made it so successful.
It's scheduled for 2015, which means there'll be plenty of time for the fans to stew and nitpick (because you know they will!).