Twelve Bell Towers

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Across
  1. 2. Like what Dover has, but a different colour (9)
  2. 4. The chief of the Admiralty? (8)
  3. 7. A trench on the beach (10)
  4. 8. All men by a mixer (9)
  5. 11. Type of van (5)
  6. 13. High scoring at Scrabble (4,4)
  7. 17. Profiteering if you make one of these? (8)
  8. 19. Found in tonic or ketchup (4)
  9. 20. Trying to get a free ride (7)
  10. 21. Womble (8)
  11. 24. Robust, heavy duty glass bottle (10)
  12. 29. So good, but only once here (3,4)
  13. 30. Touch arranged with two leads of London (7)
  14. 32. The MC at a wedding? (9)
  15. 34. Points on the front, interesting places below? (8)
  16. 36. Look left at first, and a very loud ending! (8)
  17. 37. The UK's most easterly 12 (5,8)
Down
  1. 1. Where a monarch might celebrate their centenary (8)
  2. 3. An elderly pig (6)
  3. 5. Adams, Jardine ... or Kirk? (7)
  4. 6. Found in a carousel by the river (5)
  5. 9. Yttrium or potassium (4)
  6. 10. Shave me, somehow (7)
  7. 12. A relative in a hundred! (7)
  8. 14. Found in their pleas tonight (5)
  9. 15. Can't form a mixture? (8)
  10. 16. French bread and a candle (9)
  11. 17. Scottish mountain in French hideaway (8)
  12. 18. Don't leave the car here, it might end up with teeth marks (8,4)
  13. 22. Something detectives like? (5)
  14. 23. Sounds like it might be in Oxford or Dublin, but isn't (12)
  15. 25. Plenty of these in peals! (5)
  16. 26. Could be in the larder, I pondered (5)
  17. 27. Came after the old harbour (7)
  18. 28. Torn pew fixed (7)
  19. 31. Right, a different pig (9)
  20. 33. An entrance for someone who is injured (11)
  21. 35. Bank (7)