Right of Abode
In the UK, you are free to live and work without facing any immigration limitations if you have the right of abode. There is no time restriction on how long you can stay in the country. Thus, you won’t require a visa to enter the country.
In rare circumstances, a person with a right of abode may be able to register to become a citizen of the United Kingdom under legislation passed after 2001.
In other Right of Abode situations, you might not be able to apply for a passport but might be eligible to get naturalized after a certain amount of time living in the UK.