There is no definition, because all attempts to define it have got one into worse difficulties.
It is possible to exclude evidence from a case altogether under the existing public interest immunity procedure; the Bill does not touch that. The present PII law will be completely unaffected by the Bill, so people could still go for a PII. One is obviously being actively sought at the moment in the Litvinenko inquest, although I know that only from what I read in the press. That kind of exclusion could be claimed on the ground of damage to international relations, if the Government of some third-party state would be upset if certain evidence were to be published. That goes beyond questions of national security and into total secrecy, allowing the Minister to withdraw the whole blasted thing from the proceedings and not letting even the judge use it. That measure goes much wider. Such exclusions on wider grounds happened under the previous Government.
We are sticking to national security, however, and judges, using the completely unfettered discretion that we are now giving them, will no doubt have regard to what I say. What we have in mind are things that would
cause damage to national security, by which we mean the safety of our citizens, our attempts to counter terrorism, and threats to international order among the wider public. I can assure the House that I am not in favour of excluding ministerial pigs’ ears. I am sure that the previous Government made more of them than we did, but I do not believe that that sort of thing should be put away in closed proceedings under any Government.