On Start the Week Andrew Marr talks to the writer Alan Bennett about his life and work. As he publishes his third and, he says, final selection of his diaries, Keeping On Keeping On, Bennett reflects on his reputation for tweeness, his radical politics and sexuality. He writes, "Nothing is ever quite so bad that one can't write it down or so shameful either, though this took me a long time to learn with my earliest diaries reticent and even prudish."