Impressive stuff Jon.I completed the London marathon in 3 hours 49 this year, 33 minutes better than last year - better training this year. Going to do it again in 2013 to try and get closer to 3 hours 30, then look for the next challenge. Thinking triathlon but the open water swim puts me off a bit, whats your experience of it?
Good luck with the training, there is a killer hill at about mile 11 going upto Edgbaston from Cannon Hill Park so try and do some hill work if you can.I'm tempted as I've done the last two but it clashes with Norwich at home. I would have to get home,soak in the bath for an hour or so then go to the game. Probably wouldn't go down to well with my other half.