Queen's favourite Champagnes are top investments
List of royal warrant holders of the British royal family - Wikipedia
Queen Elizabeth II's favourite brands face threat of losing royal
Queen Elizabeth's favourite brands face losing royal warrant
Champagne Krug Royal Warrant Holders Association
Cadbury, Burberry Among 600 Brands At Risk Of Losing Royal Warrant
Cadbury, Heinz, Kelloggs' Queen Elizabeth's favourite brands
Krug Champagne Only Prestige Champagnes since 1843
Drinks' royal warrants to become void after Queen's death - Drinks