Case 8N.I.
Where the dwelling-house is reasonably required by the landlord for occupation as a residence for—
(a)himself, or
(b)any son or daughter of his over the age of 18, or
(c)his father or mother, or
(d)if the dwelling-house is let on or subject to a regulated tenancy, the father or mother of his[F1 spouse or civil partner].
and the landlord did not become landlord by purchasing the dwelling-house or any estate therein after the commencement of this Order.