"They also made use of leaked information when in opposition."

So who doesn't? What's that statement meant to prove?

New Labour tosspots or Tory gits, it really doesn't matter as they would all do the same and it's naive to think they wouldn't.

Rosie, I think has it spot on. It's a matter of conscience and if that means flouting the Official Secrets Act to bring these issues out into the public arena then so be it. I wouldn't regard it particularly as theft if the information is being made public - we own the state apparatus anyway.