In England and Wales, most residential properties are let as assured shorthold tenancies (ASTs). An AST allows a landlord to let the property but also allows them to get the property back (repossession). In order to get repossession of the property, you must follow the correct procedure or you could be guilty of evicting your tenant illegally.
In Scotland, all tenancies that started on or after 1 December 2017 are private residential tenancies. These give the tenant the exclusive right to use and occupy a house or flat. They are open-ended tenancies that will last until the tenant wishes to leave the property or until the landlord relies on one or more of the 18 grounds for eviction. Ask a lawyer for more information on evictions in Scotland.