Great British Beer Festival (London)

The Great British Beer Festival champions cask-conditioned tradition with 900+ real ales and ciders at Olympia London, a unique focus that no other major festival matches. While #1 Oktoberfest pours 7 million liters of lager, GBBC's commitment to non-carbonated ale means just 50% of its beers are fizzy, appealing to purists. CAMRA's event attracts 50,000 visitors over 5 days, which is 20% smaller than #2 GABF, but it costs roughly £15 less per ticket for a comparable tasting experience.