(2) Where, under Subsection (1) of this Section, the value of any interest in land comprised in a hereditament is required to be taken to be the value which that interest would have if war damage sustained by that hereditament had been made good before the date of the notice to treat, and any works, other than works for making good the war damage, have been carried out on the land since the occurrence of the war damage, then if the making good of the war damage would involve the removal of those works, the value of the said interest shall be taken to be—

1. (a) the value which it would have if the war damage had been made good and those works had been removed; or
2. (b) the value which it would have if the war damage had not been made good so far as the making good would have involved the removal of those works,