With PM Burnham, we’ll get warmth, audacity and knowhow. For everything else, cling to hope | Polly Toynbee

He looks the part, with a rise as impressive as his speeches, but is that enough? You cannot know if someone is up to the job until they have to do it Only vaulting ambition takes anyone to No 10, but Andy Burnham’s ambition reaches phenomenal heights. Can he really make the biggest changes in 40 years? Can he build a new economy? The new prime minister lashes himself to the mast of those mighty aspirations, but adds in something even riskier – an end to rough sleeping, ordered immediately.…