Devolution – or devo-maxxing – was the order of the day in Andy Burnham’s most significant speech yet on how he would govern. In front of an eager press pack that scrambled up from London, the prime minister-in-waiting set out a bold agenda focused on devolving power, reforming Whitehall and reindustrialising Britain. But devolution is a tune plenty of leaders have played before. Tony Blair turbo-charged it after 1997, George Osborne promised a Northern Powerhouse, and Boris Johnson made plenty