A FADED GUINNESS SIGN OUTSIDE THE KINGS INN PUB ON BOLTON STREET
Guinness was founded in 1759 but didn’t publish its first ad until 1794.
Guinness stout is made from water, barley, roast malt extract, hops, and brewer’s yeast. A portion of the barley is roasted to give Guinness its dark colour and characteristic taste. It is pasteurised and filtered.
Until the late 1950s Guinness was still racked into wooden casks. In the late 1950s and early 1960s, Guinness ceased brewing cask-conditioned beers and developed a keg brewing system with aluminium kegs replacing the wooden casks; these were nicknamed “iron lungs”. Until 2016 the production of Guinness, as with many beers, involved the use of isinglass made from fish. Isinglass was used as a fining agent for settling out suspended matter in the vat. The isinglass was retained in the floor of the vat but it was possible that minute quantities might be carried over into the beer. Diageo announced in February 2018 that the use of isinglass in draught Guinness was to be discontinued and an alternative clarification agent would be used instead. This has made draught Guinness acceptable to vegans and vegetarians.