The dwelling-house is let by a registered housing association which lets dwelling-houses only for occupation (alone or with others) by persons whose circumstances (other than merely financial circumstances) make it especially difficult for them to satisfy their need for housing; and—
(a)either there is no longer such a person residing in the dwelling-house or the tenant has received from the Executive an offer of accommodation in premises which are to be let as a separate dwelling under a secure tenancy; and
(b)the association requires the dwelling-house for occupation (whether alone or with other members of his family) by such a person.