Paragraph 10
Where by reason of the structural alteration of any building a relevant hereditament becomes or becomes part of a different hereditament or different hereditaments, the relevant hereditament shall be deemed for the purposes of this Schedule to have ceased to exist on the date (as determined in pursuance of the foregoing provisions of this Schedule) of the completion of the structural alteration and, in particular, to have been omitted on that date from any valuation list in which it is then included; but nothing in this paragraph shall be construed as affecting any liability for rates under paragraph 1 of this Schedule in respect of the hereditament for any period before that date.