Mr. Jim Breslin:

There are two things, one of which is travelling back in time to see if there was a trend. To identify if there was a trend one has to do some reasonably sophisticated analysis. It is not sufficient to say that a percentage was there and another percentage was over there. One has to look at the different risk factors the laboratories have. Dr. Scally goes through that. Importantly, Dr. Scally positions us going forward so that we can all be reassured that quality systems operated by the programme would be fully robust in identifying any issues that emerge, within the context of a screening programme where there will always be an element of false negatives. One will not eliminate that fully.