6—A tenancy shall not be a secure tenancy if the house—
(a)is let together with agricultural land exceeding two acres in extent;
(b)consists of or includes premises which are used as a shop or office for business, trade or professional purposes;
(c)consists of or includes premises licensed for the sale of exciseable liquor; or
(d)is let in conjunction with any purpose mentioned in sub-paragraph (b) or (c).