Charles was given a bottle of The Spirit of Burton to take home, as well as several bottles of IPA and a bottle of 1902 King’s Ale, which was brewed by the newly crowned Edward VII in 1902 during a visit to the Bass brewery.
Mr Mills then told the King about a 41 per cent proof liquor he had created with a colleague called The Spirit of Burton, explaining that it could not be called a whiskey as it is not matured but was a distilled version of one of his strong IPAs.
Standing in front of JCB's one millionth Backhoe digger, Lord Bamford gave a speech to King and staff gathered in the reception.
Earlier, the King also helped out on the JCB production line as he wished "many happy returns" for the firm's 80th birthday.
King Charles could not resist sampling the local beer and a 'supercharged' spirit made with hops during a visit to the home of British brewing.
