The Self Preservation Society

'What happens to all the used five, ten, twenty and fifty pound notes when they are tatty, torn and grubby?'
This question started one of the most audacious robberies in UK history. The answer is that they are burned, sent away to the Royal mint and burned. Dave recruits seven unusual suspects; none with a criminal record, all in need of cash and all with a skill to help make his plan work.
He plans to rob a bank, on the day of the London Marathon. Lots of people on the streets, but they plan to escape using the Marathon as their cover. The slowest escape ever, but will it work?
A true London caper, money for everyone, why wouldn't they try it?