I believe that peaceable citizens are now living in greater security in Northern Ireland because in the past people have been correctly, according to the courts, convicted of terrorist charges as a result of the evidence of their former accomplices. Therefore, I should have no difficulty in explaining to Irish Ministers, if I met them, or to Mrs. Ferraro or to the right hon. Member for Chesterfield (Mr. Benn) that the system by which supergrass evidence in trials of this kind is tested by the court, and not before it comes to court, is correct.