Breast Cancer Screening

I am afraid that my right hon. Friend is absolutely right. The truth is that we do have a quality assurance programme, and it failed to pick up this problem for far too long. We need to understand why that happened. We think that a single IT mistake was made at the very start of the programme, and we understand that sometimes such mistakes are devilishly difficult to identify. None the less, as was suggested by the hon. Member for Stockton South (Dr Williams), there must have been clues that could have been picked up—or so one would think—and we need to get to the bottom of that.