Mr. Miche?l Mahon:

For clarity, we have no issue in expressing option 1, which is the full rebuild of houses, as a cost per square foot. Where we have the difficulty - it was in the terms of reference and we did not undertake it because we looked at it in detail - is in undertaking the remedial work options 2 to 5, calculating those and expressing them as a cost per square foot.

Many issues that arise are site-specific and can severely impact the cost per square foot.