10(1)For the purposes of this Schedule, the value of an interest at the relevant time is the amount which, at that time, would be realised by a disposal of the interest on the open market by a willing seller to a person other than the purchasing authority on the following assumptions—
(a)that none of the defective dwellings to which the designation in question relates is affected by the qualifying defect;
(b)that no liability has arisen under the provisions in section 72;
(c)that no obligation to acquire the interest arises under this Part; and
(d)that (subject to the preceding paragraphs) the seller is selling with and subject to the rights and burdens with and subject to which the disposal is to be made.
(2)Where the value of an interest falls to be considered at a time later than the relevant time and there has been since the relevant time a material change in the circumstances affecting the value of the interest, the value at the relevant time shall be determined on the further assumption that the change had occurred before the relevant time.
(3)In determining the value of an interest no account shall be taken of any right to the grant of a tenancy under section 282 (former owner-occupier) or section 283 (former statutory tenant).