All about Champagne

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Across
  1. 2. This Champagne house has a cuvée named after a former British Prime Minister (3,5)
  2. 5. Champagne made only from black grapes (5,2,5)
  3. 6. The oldest bottle of Champagne was found on the bed of this sea
  4. 9. A 3-litre Champagne bottle
  5. 11. Grand cru Champagne village famous for Chardonnay
  6. 13. The oldest Champagne house
  7. 14. The top winemaker in any Champagne house (4,2,4)
  8. 17. The inhabitants of the Champagne region
  9. 18. Unit of measure for pressure inside a bottle of Champagne
  10. 21. Removal of collected sediment from the neck of the inverted bottle after second fermentation
  11. 22. She famously bathed in 350 bottles of Champagne (7,6)
Down
  1. 1. Oft-quoted Champagne Madame
  2. 3. Gradually tilting the bottle from its horizontal position, so that the sediment is collected in the bottle neck
  3. 4. Old-fashioned style of Champagne glass
  4. 7. Champagne Salon is owned by this more well-known brand (7,7)
  5. 8. Opening a Champagne bottle with the single slice of a sword across the bottle neck
  6. 10. Yeast cells are broken down during this process
  7. 12. Many Champagne house HQs are located in this city
  8. 15. Liqueur d'__________ is added at the end of the winemaking process, before the bottle is sealed
  9. 16. Roederer's flagship cuvée
  10. 19. Champagne's third most famous grape (5,7)
  11. 20. Used to describe Champagnes with 0-12g/L sugar added
  12. 23. This luxury goods company owns Champagne brands including Krug, Veuve Clicquot, Dom Pérignon and Mercier