Most foreign nationals who come to the UK do not know that they must pay a ground tax if they own only the property and not the land that it is built on. This type of ownership is called leasehold and means a long-term rent for up to 999 years. As a rule, a leasehold property is cheaper, and the annual rent rarely exceeds £100.
However, if you want to secure a property for good, you should aim at a freehold property when both the building and the land will belong to you.