With a freehold title, both the building and the land beneath it are registered in your name at Land Registry. There is no superior landlord, no ground rent to pay, and no lease counting down. In England and Wales, houses — whether detached, semi-detached or terraced — are almost always sold freehold.
In practice, if you buy a detached house in Birmingham as a freehold owner, any decision to extend the property or alter the garden is governed by planning rules rather than a landlord's consent. Flats in England are typically sold leasehold, though share-of-freehold and commonhold arrangements exist as alternatives worth understanding before you buy.
For overseas investors, freehold title offers the cleanest ownership structure — no ground rent exposure, no landlord consent requirements, and no lease erosion risk — which can simplify both financing and eventual resale.