You shell go to the fair

The start of the native oyster season is an opportunity to gorge on seafood and champagne (or Guinness if you're a traditionalist).

It's not just oysters, but a huge variety of fishy delicacies prepared in front of you by expert chefs. There will also be cooking demos, plus steel band music and street entertainers.

Hay's Galleria Tooley Street, SE1 (020-7224 0994). Fri 5 & Sat 6 Sep, 11am-7pm, Sun 7 Sep, 11am-6pm, free.