11(1)This ground is that both of the following conditions are met.
(2)The first condition is that the dwelling-house proposed to be let on the new tenancy has features that—
(a)are substantially different from those of ordinary dwelling-houses, and
(b)are designed to make it suitable for occupation by a physically disabled person who requires accommodation of the kind provided by the dwelling-house.
(3)The second condition is that if the new tenancy were granted there would no longer be such a person residing in the dwelling-house.