FB, just so you know, I'm in the 35-39 age group so I don't think I'll be starting at the same time as Petal.
Oh, and getting to get up at 5am to go swimbling in the Thames, try not to fall off my bike over 26 miles and struggle up that nasty-hill-by-the-castle 3 times on the run is my birthday treat. Can't wait :D