KEP themed (and hopefully) less annoying crossword

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Across
  1. 3. Postcode the big red boat departs from, letters only (6)
  2. 6. Southernmost sandwich (4)
  3. 7. Argentine submarine formerly known as USS Catfish (5,2)
  4. 9. 17/1/1775 (10,3)
  5. 11. Massive cloud breaker (9,5)
  6. 12. Forbidden leaf that crashes economies (7)
  7. 14. The highest compliment a plumber can provide (7)
  8. 16. Fe male peninsula (8)
  9. 20. Correct new name for St Andrews (13)
  10. 21. Pulse like dramatic cloud (10)
Down
  1. 1. Fluffy bundle of joy (3,8)
  2. 2. The Montreal protocol sought to address this Antarctic hole (5)
  3. 4. Regulator of fish (6)
  4. 5. Zavodovski volcano and experience (8)
  5. 8. Localised Köppen climate classification (6)
  6. 10. Local sea which is considered new in east Canada (6)
  7. 13. Island of Shackleton stranding and massive seal (8)
  8. 15. The former north sandwich islands (6)
  9. 17. Freezing lookout similar to a plane (9)
  10. 18. Ideal weather for winter sports (8)
  11. 19. Antarctica's largest sub-glacial lake (6)
  12. 22. Southernmost active volcano (6)