Interesting crossword

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Across
  1. 1. how Londoners call their underground?
  2. 3. the surname of the English count , who in 1762 invented a new dish,now bearing his name
  3. 5. the traditional symbol of England
  4. 6. the colour of the taxies in London
  5. 8. a mean of transport which appeared in London in 1863
  6. 9. how many ravens live in the Tower, according to the legend?
  7. 10. the native city of Robinson Crusoe
Down
  1. 1. the famous museum of Madam ...
  2. 2. the name of the Shakespeare theatre in London
  3. 4. the favourite accessory of Elizabeth II
  4. 7. how many children Elizabeth II has?