Talk about London

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