Ms Maria Graham:

The costs that would have been explicit would have been in the non-domestic sector and they varied considerably from local authority to local authority. One of the issues in looking at it is a considerable number of costs are fixed. The marginal cost of the additional production of water is different. One would not simply say that by fixing all the leaks, the cost would be reduced by half because some of the costs are fixed and they are a high proportion of the ongoing operational cost. However, there is a huge dividend to be found in fixing leaks both on the public side and customer leakages, which is providing to be significant as the meters go in.