Without so much as a leadership contest, it is becoming clear that Andy Burnham will be Prime Minister within weeks. Substantive change to the Labour Party machine, however, is a distant dream. Indeed, Burnham is acting as if he already has the keys to No. 10. Burnham’s chief of staff We now know that his chief of staff will be James Purnell, an ex-chair of Labour Friends of Israel. In 2002, Purnell was hosted by the Israeli state in Tel Aviv. Now, he will be the most senior adviser in the British government. The lobby group was one of the first…