Award-winning food writer and historian, Angela Clutton delves into the history and unsurpassable culinary usefulness of world vinegars. She'll address 'what is vinegar' and unlock some of the secrets of fabulous fruit vinegars, wine vinegars, and Britain's own heritage vinegar - malt. There'll be vinegars to taste and samples drawn from recipes in Angela's latest book, The Vinegar Cupboard.