John Osborne: New biography records the day the Look Back in Anger playwright was chased by an angry mob
John Osborne, the writer of 'Look Back in Anger' and 'The Entertainer', was hailed as Britain's most provocative playwright. But, as this extract from a new biography by Peter Whitebrook reveals, his first and only musical was such a disaster that after the opening night, he was chased up Charing Cross Road by an angry mob - and fled to France soon after