Two hours of yakking about Israel. That’s all you get from Giant at the Harold Pinter Theatre. Endless wittering laced with venomous bigotry. The year is 1983 and the celebrated kiddie author, Roald Dahl, has kicked up a massive stink by denouncing Israel for attacking Lebanon in late 1982. His latest scribble, The Witches, is about to be published in America but a handful of bookshops are threatening to boycott his work.