Touch in with Oyster or lose out
http://www.tfl.gov.uk/tfl/microsites/zip/default.asp

quote:

Originally posted by Passenger1:
Touch in with Oyster or lose out
http://www.tfl.gov.uk/tfl/microsites/zip/default.asp

only a small percentage of the population will actually be affected by this as they do not live or work in london

Some people have to travel to London occasionally though - but then your best bet is to get a travelcard or walk - unless you want to pay £4 for a single ticket!

It's all designed to keep non-Londoners out of London!