"Brimstone" wrote:

There are too many variations and possibilities to give a "personal answer"
but here the site with all the info you need.

http://www.tfl.gov.uk/tfl/


Shame really, it used to be quite simple. Tourists bought 1 day, zone 1 only
travel cards if they were going to be in London for just a day or two, or a
weekly zone 1 card if they were going to be there for 3 or more days. Could go
anywhere they wanted on the tube or bus as long as they stayed off during the
early morning rush.