Professor Ann O'Doherty:

It depends. If we look at our screening programme, we should be screening within two years, plus or minus three months. Looking at our backlog, it is 25,000 for that period. Going back to two years plus six months, we have a lower rate. I have the exact figures here. What I am trying to say, however, is that it is impossible to state the numbers because if we get to people quickly enough, then we will not have the adverse effect. I will give the numbers to the Deputy.