Andy Burnham, Britain’s presumptive next prime minister, has set out details giving more powers to local government as part of a plan to spread wealth and economic growth. Saying Westminster “is not working” and is “broken”, he set out a sweeping economic vision in a key speech from Manchester – where he was mayor for nine years – to bring voters, colleagues and financial markets up to speed with his ideas during his rapid progress towards power. “We need to change politics and we need to do it...