In the early post-war years, Doris Lessing left her native Southern Africa in search of a grail. But the English she pursued – and found – were living in working-class homes in East London. They were lusty, quarrelsome, unscrupulous and full-blooded – quite unlike what they were supposed to be.In the early post-war years, Doris Lessing left her native Southern Africa in search of a grail – a life …