Who Wants to Be a Millionaire? - S5-E6
Revealing mistake: When Del and Jumbo come into the Nags Head to discuss business, Del asks Mike for an Australian lager for Jumbo. Mike lists other Non-British lagers as a choice. When Jumbo says he'll have one of them, Mike produces a pint in less than 10 seconds, certainly no time to have poured a pint.
Chosen answer: An apparent long string of illnesses.