Treasure Hunt

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Across
  1. 1. American name or a hearty sandwich / roll chain
  2. 4. 2 across-es worst enemy
  3. 6. Royal name
  4. 7. The 3rd Doctor (surname)
  5. 8. They loved their yellow submarine
  6. 11. The Amazing
  7. 12. Not left
  8. 14. Chain of stores, now defunct
  9. 15. Britain's longest running street
  10. 18. Batmans greatest enemy
  11. 19. Worthing towns main street
  12. 20. Some call him the King
Down
  1. 2. Most computers use this
  2. 3. Female fronted 70s band
  3. 5. Keep the water off
  4. 9. Radio 2 afternoon DJ
  5. 10. Capital of Sussex
  6. 13. King of the Jungle
  7. 16. Marvel, not the 60s TV show
  8. 17. To sing to a track