I realised I was a fraud on the sub 3:30 thread as due to injury I've realised I'll never make the time. So in the hope that some may join me in the quest I've decided to start the sub 3:45 thread.
For what it's worth I've ran one previous marathon at Loch Ness 2003 in 3 Hours 49. Training for London had been going quite well except that I keep getting knee injuries in training runs much beyond two hours this led to me realising I'll never make my initial 3.30 target time.
So I hope some of the sub 4 runners will join me and post your training and thoughts on this thread.