A claim for compensation following modification or revocation of planning permission can be made to a council under section 26 of the 1965 Act.  It may, however, appear to a council that planning permission could have been granted for development other than that which gave rise to the claim.  In such cases a council may direct that it shall be assumed that permission for that other development would be granted either unconditionally or conditionally when assessing the amount of compensation payable.
Commentary on Sections Part 6: Compensation Section 188: Compensation where planning permission assumed for other development