Cracking bloke, extremely knowledgeable, able to communicate at all levels, and above all fair. Aside from getting CTRL (phase 1) pretty much delivered, he was instrumental in driving the change programme at Network Rail. He was the key figure in dealings with government that helped restore, indeed significantly enhance, the reputation of the rail industry post Hatfield and the Railtrack collapse. Without this, I doubt whether we would now have a major electrification programme underway or be talking seriously about HS2. Oh and he brought the Olympics construction programme in on time.
If all that doesn't deserve a knighthood, then I'm not sure what does.