Paragraph 15

If any alterations or additions, whether permanent or temporary, to railway property shall be shown upon approval of plans under paragraph 8 above to be reasonably necessary or become reasonably necessary during the construction of the specified works or during a period of 12 months after the completion thereof for the safe or convenient operation of Railtrack’s railway network in consequence of the construction or operation of the specified works, and Railtrack give to the Executive reasonable notice of their intention specifying the alterations or additions to be carried out, the Executive shall pay to Railtrack the reasonable cost thereof including, in respect of any permanent alterations and additions, a capitalised sum representing the increase in the costs which may be expected to be reasonably incurred by Railtrack in maintaining, working and, when necessary, renewing any such alterations or additions.

If the cost of maintaining, working or renewing railway property is reduced in consequence of any such alterations or additions, a capitalised sum representing such saving shall be set off against any sum payable by the Executive to Railtrack under this Schedule.