Great British Beer Festival

CAMRA's Great British Beer Festival at Earls Court is Britain's biggest beer festival and brings together a wide range of real ales, ciders, perries and international beers. There will be at least 450 beers available throughout the festival including golden ales, fruit beers, stouts, bitters and some international real lagers. As well as a great selection of beer there is also cider and perry, all available in pint, half pint and third pint measures.

(I'm not in any way an official organiser, I just wanted to add it to my calendar)