“a person who occupies the whole or a substantial part of the hereditament in right of an owner’s interest in it, and has so occupied the hereditament or that part of it during the whole of the period of six months ending with the date of service.”
“in relation to a dwelling-house, means the person who, as owner or lessee under a long tenancy, within the meaning ofPart I of the Leasehold Reform Act 1967 , occupies or is entitled to occupy the dwelling-house.”