Charlotte's 50th crossword.....

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Across
  1. 4. Birthday cake month (4)
  2. 5. A place to swim (4)
  3. 7. They have taken us all around the world (7)
  4. 10. A tree or a home? (8)
  5. 15. The one where we sweated (5)
  6. 16. The best type of cake (8)
  7. 17. The best uni in the world (9)
  8. 18. A 10-year workhorse (4,1,1)
  9. 19. The one where we smoked (4)
  10. 21. L of a number (5)
  11. 22. The one with a volcano part 1 (9)
Down
  1. 1. The one where it all began (3,5)
  2. 2. The one where we went twice in one year (6)
  3. 3. The one with a volcano part 2 (6)
  4. 6. 5 little letters (6)
  5. 8. The one with the first-class sleeper (5)
  6. 9. Where all the money goes! (8)
  7. 11. Birthday girl (9)
  8. 12. A new way to travel (6,3)
  9. 13. The one with a river border (8)
  10. 14. Where all the rest of the money goes (when R is home) (5)
  11. 15. The one with a boat (7)
  12. 20. The most fun you can have with your top off (4)