My Lords, I suppose that I can claim to have had some experience in dealing with this area of the law in the past. The first thing I want to say is that the procedure that has hitherto been adopted in relation to national security is a secret procedure in which the judge sees the documents and the other side does not. This secret procedure has been established and used many times, as the noble and learned Lord, Lord Brown, has said. There is nothing novel about that kind of thing having to happen in relation to sensitive material.
The first condition for the closed procedure is that one of the parties will be required to produce sensitive material—that is to say, material which is damaging to national security. The noble and learned Lord, Lord Brown, has said that he was considering redaction as an alternative to CMP, using screens to hide people’s identity. That must be considered before you can say that sensitive material has to be produced. The idea of that is to remove the sensitivity of the material and make the redacted material harmless to national security.
It seems to me that the only alternative that this first amendment would introduce is the amendment of public interest immunity. As the noble and learned Lord, Lord Brown, has explained in the case to which he referred, attempting to ascertain that would require, in some cases, a very long process. The process is equally one in which one of the parties is not allowed to take part. It is not much of an advantage over this procedure.