"13 Increases of rent under assured periodic tenancies (a) a statutory periodic tenancy other than one which, by virtue of paragraph 11 or paragraph 12 in Part I of Schedule 1 to this Act, cannot for the time being be an assured tenancy; and (b) any other periodic tenancy which is an assured tenancy, other than one in relation to which there is a provision, for the time being binding on the tenant, under which the rent for a particular period of the tenancy will or may be greater than the rent for an earlier period. (a) the minimum period after the date of the service of the notice; and (b) except in the case of a statutory periodic tenancy, the first anniversary of the date on which the first period of the tenancy began; and (c) if the rent under the tenancy has previously been increased by virtue of a notice under this subsection or a determination under section 14 below, the first anniversary of the date on which the increased rent took effect. (a) in the case of a yearly tenancy, six months; (b) in the case of a tenancy where the period is less than a month, one month; and (c) in any other case, a period equal to the period of the tenancy. (a) the tenant by an application in the prescribed form refers the notice to a rent assessment committee; or (b) the landlord and the tenant agree on a variation of the rent which is different from that proposed in the notice or agree that the rent should not be varied. (5) Nothing in this section (or in section 14 below) affects the right of the landlord and the tenant under an assured tenancy to vary by agreement any term of the tenancy (including a term relating to rent)."
“The date from which the new rent will take effect is therefore of critical importance to the validity of a section 13 notice. The date specified will enable the tenant to understand whether these statutory requirements have been complied with and, if so, will leave no room for doubt about the date from which the new rent will be payable. But it also serves another important purpose, which is to specify the deadline for the tenant to challenge the proposed new rent by a referral to the rent assessment committee. This deadline is "the beginning of the new period specified in the notice" (subsection (4)). If a valid notice has been served and the tenant fails to refer the matter before this deadline, the new rent proposed in the landlord's notice takes effect without further ado.”
“the rent stated in the Notice does not accord with the duration of the rental period, that is a quarter, and so the notice is probably invalid”
“that the FTT failed to give reasons why it held that that it had jurisdiction to allow the landlord’s application herein for rent increases when the FTT had previously refused to allow the landlord’s three previous applications.”