It's London, Baby!

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Across
  1. 2. If your money is gone, your Oyster Card is no longer...
  2. 5. You can buy your tickets at a ... machine.
  3. 6. When you use an Oyster Card, the ticket barrier will open ...
  4. 8. The train to Hogwarts leaves from ... 9 3/4
  5. 12. Days in a row, without gaps.
  6. 13. When you've done something often, you are...
  7. 16. Part of the underground train.
  8. 17. To get on a train
Down
  1. 1. I wanted to go to a musical, but there were no more tickets ...
  2. 3. I don't like taking the underground, it's too much ...
  3. 4. Young .... pay half price for the entrance.
  4. 7. 'Mind the gap!' is a common ... on the underground.
  5. 9. A financial punishment for misbehaviour
  6. 10. The price for the hotel is 50 pounds, but if you want to have breakfast, that cost will be ...
  7. 11. Word that means 'a long waiting line'
  8. 13. Automatic staircases on the underground
  9. 14. St. Paul's Cathedral is famous for its massive circular ...
  10. 15. Ticket price