My boyfriend and I are staying in London for four days, and as I've never stayed in London, I'm confused over tube travel - I'm reluctant to use it due to overcrowding, however, there's no other choice is there! I've heard of the oyster card, but I want to know exactly how to use it from people who have used it also. The journey's we'll take are 20 min+ so how much money do you need to add on? Also, can two people use it together?
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