Christmas in the Blitz

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Across
  1. 1. Surname of "White Christmas" singer (6 letters)
  2. 4. Codename for Allied intelligence project breaking Enigma (5 letters)
  3. 6. Common heating resource, rationed during WWII (4 letters)
  4. 8. Alliance including Germany, Italy, and Japan (4 letters)
  5. 9. Last name of the U.S. President during most of WWII (9 letters)
  6. 11. One of the five landing areas at Normandy (4 letters)
  7. 12. Nickname of Dwight D. Eisenhower (3 letters)
  8. 14. Type of British bomber used in WWII (9 letters)
  9. 16. A branch of this is a traditional peace symbol (5 letters)
  10. 19. Large bomb used in air raids, colloquially known (10 letters)
Down
  1. 2. London cathedral that survived the Blitz, symbol of resilience (2,5 letters)
  2. 3. Site of a major battle in North Africa (2,7 letters)
  3. 5. Indoor shelter type, named after a British politician (7 letters)
  4. 7. First name of Churchill's wife (9 letters)
  5. 10. Spherical Christmas ornament (6 letters)
  6. 13. Abbreviation for Britain's air force (3 letters)
  7. 15. Codename for naval component of Operation Overlord (7 letters)
  8. 17. Festive beverage often spiced with nutmeg (3 letters)
  9. 18. Another name for Santa Claus, derived from St. Nicholas (4 letters)