Can I just test with you what you go on to say in this sentence. You say:
"... I would accept that, because the media staff within DPA come from media organisations, they ought to be able to return to other media organisations without restriction, other than of course the Official Secrets Act."
So you're creating an exception here. Is this right: you have two classes of person, you have someone in the police who has never worked for the media before, there should be a two-year restriction for them, but someone within the DPA who may have worked within the media before, there shouldn't be any restriction in relation to that?