Talk about London

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Across
  1. 2. System of mass surveillance invented in the novel 1984
  2. 4. Opposite of poverty
  3. 7. Synonym of tube
  4. 9. Synonym of district
  5. 12. Synonym of underground
  6. 13. Type of music without instruments but with rythm and rhymes
  7. 15. Name of a soldier who gave his name to a column in London
  8. 18. Document to visualise a city
  9. 19. Central place in London where you can find the Nelson's column
  10. 20. Biggest park of London
Down
  1. 1. Specific bus in London
  2. 3. Opposite of common ground
  3. 5. Big wheel built in 1999 to celebrate the new Millenium
  4. 6. Opposite of violence
  5. 8. Name of the palace of the Parliament
  6. 10. Way used to cross a river
  7. 11. Opposite of beauty
  8. 14. Opposite of equality
  9. 16. Queen's home in London
  10. 17. Name of the river crossing London