“(2) For the purpose of securing an increase in the rent under a tenancy to which this section applies, the landlord may serve on the tenant a notice in the prescribed form proposing a new rent to take effect at the beginning of a new period of the tenancy specified in the notice…”
“(1) … shall determine the rent at which, subject to subsections (2) and (4) below, the [FTT considers] that the dwelling-house concerned might reasonably be expected to be let in the open market by a willing landlord under an assured tenancy— (a) which is a periodic tenancy having the same periods as those of the tenancy to which the notice relates; (b) which begins at the beginning of the new period specified in the notice; (c) the terms of which (other than relating to the amount of the rent) are the same as those of the tenancy to which the notice relates; and (d) in respect of which the same notices, if any, have been given under any of Grounds 1 to 5 of Schedule 2 to this Act, as have been given (or have effect as if given) in relation to the tenancy to which the notice relates. (2) In making a determination under this section, there shall be disregarded— (a) any effect on the rent attributable to the granting of a tenancy to a sitting tenant; (b) any increase in the value of the dwelling-house attributable to a relevant improvement carried out by a person who at the time it was carried out was the tenant, if the improvement— (i) was carried out otherwise than in pursuance of an obligation to his immediate landlord, or (ii) was carried out pursuant to an obligation to his immediate landlord being an obligation which did not relate to the specific improvement concerned but arose by reference to consent given to the carrying out of that improvement; and (c) any reduction in the value of the dwelling-house attributable to a failure by the tenant to comply with any terms of the tenancy.”