One of the first tasks of Whitehall’s mandarins – the permanent government – is to indoctrinate a new prime minister in the need for official secrecy, especially around the intelligence agencies. Andy Burnham should be more sceptical judging by his comments over many years and could prove to be a more difficult person to convince than his predecessors. His accession to the premiership comes at a time of unprecedented public criticism of the agencies, of MI5 in particular.  Burnham was at the forefront of the campaign to get justice for the families of the 97 unlawfully killed at the 1989 Hillsborough…