Back in December 2008, Mr Maude was told that the Security Commission – a Cabinet Office body dedicated to investigating security breaches in Whitehall – had looked into two cases since 1997. Reports were published. One of these was about the Ministry of Defence; the other related to Buckingham Palace.
However, the Treasury was oddly unconcerned by another event:
"Mr. Maude: To ask the Chancellor of the Exchequer if he will request the Security Commission to undertake an investigation into the unauthorised disclosure of information relating to taxation measures in the Pre-Budget Report 2008. 
And yet the Security Commission has actually published reports of other inquiries.
Details of the 2008 Pre-Budget Report were widely trailed in the media. Martin Broughton, President of the CBI, said "The Treasury appears to be leaking like a sieve". Bookmakers stopped taking bets on major policy changes before the Report officially came out.
All of this contrasts rather strikingly – and indeed suspiciously – with the East German approach taken to the Damian Green case.