The pass is amazing. You can go to loads of sites around London using the pass and most of the time we didn't have to queue. However, I would recommend doing your homework first and writing an itinery of the places you want to see as once the card is activated, no matter what time of day, that is classed as your first day and then its consecutive. The guide book you get with it is great. I loved the card so much that I have bought the ParisPass as that is our city break this year.
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