Paper anniversary

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Across
  1. 5. One of the oldest known boardgames (10)
  2. 6. Latin dance, also a salad (5)
  3. 7. Snowdonia mountain range (9)
  4. 8. To take small mouthfuls of liquid (3)
  5. 9. First meal you made me (7)
  6. 13. Time for Bristol gin (3,6)
  7. 16. Crosby sculptor (6)
  8. 19. Welsh surfing town (9)
  9. 21. New Zealand fruit (6)
  10. 22. Precarious river crossing (8,6)
  11. 26. Shrubbery party(7)
  12. 27. Second date activity (7)
  13. 29. Antiquated cocktail (3,8)
  14. 33. Home of Lovell telescope (7,4)
  15. 34. Explore each other and… (9)
  16. 35. Showman (6,5)
  17. 37. ...the rooftop tent (5)
  18. 38. UK's oldest family-run service station (5)
Down
  1. 1. Band, town in Scotland (9)
  2. 2. South African vegetable dish(9)
  3. 3. Kelp Army (anag)(4,4)
  4. 4. Site of stunning sunset swims (8)
  5. 10. A pro and a con (adjective)(11)
  6. 11. Bulbous perennial, made into pesto (4,6)
  7. 12. Our first festival (5)
  8. 13. South Manchester water park (4)
  9. 14. Edible tree decoration(9,6)
  10. 15. Fun activity, according to Fleetwood Mac (6)
  11. 17. 10km triathlon activity (3)
  12. 18. Twice Prime Minister, aristocrat (9)
  13. 20. Cairngorms walk (6,4)
  14. 23. Limbic mimicry involving the hips (6)
  15. 24. High-up green space (3,6)
  16. 25. Tetris-style game (6)
  17. 26. Sam (6,3)
  18. 28. Great bell, also a neighbour (6)
  19. 30. Bird that sustains long-distance relationship (9)
  20. 31. Yorkshire village, home of the Brontes (7)
  21. 32. Location whenever I’m with you (4)
  22. 36. Filling foodstuff (5)