13(1)For purposes of this Schedule the expectation of possession carried by a tenancy is the expectation which it carries at the relevant time of possession after the tenancy in possession, on the basis that—
(a)subject to sub-paragraph (2) below, the tenancy in possession terminates at the relevant time if its term date fell before then, or else terminates at its term date or (in the case of a tenancy which has been extended) its original term date ; and
(b)a tenancy other than the tenancy in possession terminates at its term date.
(2)In a case where before the relevant time the claimant's immediate landlord had given notice to quit terminating the tenancy in possession at a date earlier than the term date, the date specified in the notice to quit shall be substituted for the date in sub-paragraph (1)(a) above.