For two decades, Vivienne Westwood has been one of Britain's most consistently original, outrageous and controversial designers. From iconoclastic outsider she has evolved into an internationally revered figure. Yet she has never ceased to excite passionate feelings, both for and against, and her lifestyle - she continues to live in a modest council flat in South London, and bicycles around the city - is in the starkest contrast to the opulence surrounding other leading designers.