The amount of compensation payable in pursuance of a requirement under paragraph 10(2)(a) of this Schedule in respect of the diminution in value of the assets of the operator's relevant business shall be an amount equal to the difference between their market value immediately before the revocation in question and their market value immediately after that revocation.

No compensation shall be paid in pursuance of such a requirement as aforesaid in respect of any expenditure incurred in winding up the whole or part of the operator's relevant business in so far as that expenditure is taken into account in computing the amount of compensation payable to him under sub-paragraph (1) of this paragraph.

In this paragraph " market value ", in relation to any assets, means the amount which they would have fetched if sold in the open market by a willing seller to a willing buyer.