Mr. Ronan Mulhall:

The drop in the cost relates to the level of assessment on the site as regards options for remediation. It is also subject to tendering so it is not a question of saying it will cost X and tendering for that amount.

The estimates were initially substantially higher but different approaches have been proposed in terms of how to deal with the material on site. It concerns issues such as removing clay that was not contaminated rather than removing everything, so it relates to the engineering approach, which explains some of the variation. One obviously has to be prudent and anticipate more substantial costs in the initial phases.