Sch 15 para 11
If in a case falling within paragraph 9, it is subsequently shown that the claimant was not entitled to the interest in question, either in the whole or in part of the land to which the claim related, the acquiring authority may recover from him an amount equal to the compensation paid, or to so much of that compensation as, on a proper apportionment of it, is attributable to that part of the land, as the case may be.