London on public transport: what kind of tickets to use?
I will stay in London for only 2 days, but will travel using underground train (tube) quite often.
So my questions are:
- Should I buy an Oyster card? What is the minimum deposit of Oyster? How long is the validity of the Oyster card?
- Is there any card that I can buy that allow me to travel freely for 2 days without any extra charge? (Something like 15 pounds card that will expire within 24 hours, but can be used countless times)
- Or anybody has any other alternative?
UPDATE : from the link that I duplicated, I found all of the info I needed in http://visitorshop.tfl.gov.uk/