The 'largest pub in the world' opens its doors in London from 7 to 11 August, when the Great British Beer Festival takes over Earls Court. This year is the 30th anniversary of the event, organised by the Campaign for Real Ale, and visitors will have a choice of 450 of the UK's finest real ales as well as live music, pub games and a Bieres sans Frontieres bar, offering delights from around the world. Tickets are £8 on the door, £6 in advance from 0870 380 0150; www.gbbf.org.uk.