Ms Derville Rowland:

I cannot speculate on that. It is as we check issues. In some of the work we are doing we are recreating the actual groups of customers to check it was done properly. It is in this checking work that the figure may vary. In some of the examples I have used the number has actually been less than the estimates. Occasionally the number is only slightly greater than the estimate. There are other occasions when the number is off by 20, or it could be by 80, or it could be reduced by-----