An international audience of 45,000 aficionados will gather at Olympia to celebrate more than 400 British ales, 200 international beers, and a veritable ocean of lagers, perries and ciders. The Great British Beer Festival (Tue 5-Sat 9 Aug) sees the biggest collection of beers under one roof the UK has ever seen. There's live music, including Lindisfarne on Wednesday, John Otway on Thursday, and - be still, my beating heart - the Fulham Brass Band on Saturday.