<p>British aides express relied, as the prime minister’s team say the meeting was at the ‘top end of their expectations’</p><p>On the flight out to New York this week, one of Andy Burnham’s senior aides warned him that meeting Donald Trump would be the political equivalent of white water rafting.</p><p>While there is a well-known playbook the US president deploys when he first meets other world leaders, he remains a deeply unpredictable figure and any dealings with him can leave you crashing int