Who is the owner of a leasehold property?

Who is owner of leasehold property involves two parties: leaseholder who owns lease and freeholder who owns land and building. Leasehold property, which is property tenure common in UK, Australia, and other countries, where you buy right to occupy property for fixed term, has owner structure with leaseholder, also called leasehold owner or lessee, who is person who buys leasehold property and owns lease for fixed term like 99 to 999 years, with right to occupy, sell, and mortgage lease during term, registered at Land Registry as owner of leasehold interest, with leaseholder responsible for ground rent and service charges, and freeholder, also called landlord or lessor, who is owner of freehold interest in land and building, who owns land permanently, with freeholder typically being property developer, investment company, or individual investor, with freeholder owning freehold title registered at Land Registry, with right to collect ground rent and service charges and enforce lease terms, with freeholder able to sell freehold interest to another investor. For example, in UK flat, leaseholder owns flat lease for 150 years, freeholder owns building and land. So owner of leasehold property is leaseholder who owns leasehold interest for term and can occupy and sell lease, while ultimate owner of land and building is freeholder who owns freehold, with two owners: leaseholder for lease term and freeholder for freehold.