Here's a "before" picture. You can see that I look really clean! Nice, clean clothes, freshly washed hair etc etc. I am carefully threading my race chip through my shoelaces
And here I am at the finish.

So... the marathon was a blast. I did 4h 52m, pretty much 11 minute miles the whole way along -- aside from a blip around mile 23 when I hit "the wall!
As everyone says, it's a very friendly marathon in London and there was a wonderful crowd. Lots of people run in fancy dress: I kept pace with Wonder Woman for quite a while, and then was passed by a giant ice cream cone around mile 12. The spectators were just shouting themselves hoarse with cheering. A lot of people print their names on their running vests, and so spectators can personalise their encouragement, which is quite funny to listen to. "Come on Steve! Keep it up Mary! Come on Chicken man! YEA, COME ON CHICKEN MAAAAN!!" And of course, the constant cry, particularly from about mile 18 onwards, of, "JELLY BABIES! JELLY BAAABIEEEEES!!!" (I can't imagine any other situation in London when, without even looking, I would grab something from a jar offered by a complete stranger and stuff it in my mouth!)
Despite the crowds and total lack of mobile phone signal (an estimated million people out on the streets of London, between runners, supporters and staff), I did manage to make contact along the route with friends and family who came out to support. Or, more accurately: they managed to make contact with me, screaming at the tops of their voices when they saw me running by. Thank you Gen, Annemarie, Deborah and Kay, who waited for hours by the side of the road so that they could cheer me on. And especially to Nick, who braved the crowds while single-handedly pushing Benji in the buggy and carrying Sophie on his shoulders!
So it's done!! At last!! Done!! I can get back to my normal life again! Once I crossed the finish line, the only thought in my mind was "I'm never doing that again!" but now already I'm thinking about when I can do the next one!! It's a great buzz. The first 6 miles just went by in the flash of an eye... my feet were hardly touching the ground, I was giving everyone high fives... it was great. And I was trying hard to not go out too fast. I kept on saying to myself, go slow... now go slower!! Because you are so pumped up with carbs and the 3 week rest that you are just ready to shoot out of there. So it is quite hard to hold yourself back. But I am pleased that I was able to keep up a steady pace all the way. Up to mile 13 was no problem, and it was wonderful going over Tower Bridge -- the view from the centre of the road is quite different from when you walk over the pavement on the side. Then up to 16 I didn't see any mile markers so I was going ok but wondering where I was. Then after around mile 20 things got a bit harder... and mile 23 was HARD, but after that the end was in sight. I had been so looking forward to that last stretch, passing the Houses of Parliament, Birdcage Walk, the Mall, but I was so exhausted I just couldn't enjoy it, because quite honestly, all I could think was, "Where the hell is that finish line?!!"
And now?
I can't wait to do it all over again.