Plus you will need a Visa debit card to get any money from an ATM at the olympics as all others are being replaced or turned off:
http://www.metro.co.uk/olympics/900869-visa-only-atms-at-london-2012-could-leave-olympics-fans-without-cash
I will be taking my Birdy on the train during the Olympics – I might have to cycle home some evenings when the usual service disruptions occur with signal failures, a probably increase in suicides, etc.
There are already capacity problems which stem from the lack of stock, which hasn’t been increased in line with the increasing passenger numbers and revenue.
I used to comfortably catch the 7:40 train with my Dahon Zero-G 26inch wheeled folder as the vestibule areas were clear back then – now the same train is stuffed full with standing passengers and I now have to catch the 6:40 or 6:50 for the same ease of getting on – and that is with the Birdy I downsized to and at Woking which has 14 trains an hour to London in peak times.