But it did not prevent the crimes taking place, or deter those involved, because the hon. Gentleman has just referred to the ones which have taken place. He was claiming that the measure helped the police to catch people. Surely what he has to show on his figures is that because the police were able to hold people for that little bit longer they were enabled to get the evidence which led to a conviction. I suggest that in very many instances the police already had the crucial evidence.