PP - haha, not quite; although I do remember the man-dog episode quite well.
You'll be off sharpish from the green start, so I expect I'll be a minute behind you in the early miles. Will catch you up and surprise you.
I do remember my first London marathon in 2000, lining up at the start next to a bloke dressed as a cow. Thought he was nuts, but distinctly recall being passed by him as I was walking along the Embankment in a great deal of distress much later on. Certainly not the last fancy dress I've been beaten by. Although my mate hasn't returned to the marathon for over 10 years after getting beaten by the lottery balls in 2004!!
SL - will be a hell of a blow if you forgot to enter! Just get Marigold to pick up his number and use that. You'll get a free hotel out of it. Nobody would notice, and I'm pretty sure the VLM people are fairly relaxed about number swaps.
Alternatively I expect you could just enter on the day???
Padams - hasn't been revealed yet, but does involve some sort of costume. Given up trying to run well at VLM in conventional clothing so thought it's time to try something a bit different. Will stick out like a sore thumb in the Fast Good for Age start. Stand to win a £100 bet if I can break 3 hours.