Britain - British - Briton
Britain or Great Britain consists of England, Scotland, and Wales. The United Kingdom consists of England, Scotland, Wales, and Northern Ireland. The British Isles refers to Britain, Ireland, and all the smaller islands around the coast.
The nationality of someone from the United Kingdom is British, although some people prefer to call themselves English, Scottish, Welsh, or Northern Irish. It is incorrect and may cause offence to call all British people ‘English’.
You can refer to all the people who come from Britain as the British.
I don't think the British are good at hospitality.
The British have always displayed a healthy scepticism towards ideas.
The British can also be used to refer to a group of British people, for example the British representatives at an international conference.
The British have made these negotiations more complicated.
The British had come up with a bold and dangerous solution.
In writing, an individual British person can be referred to as a Briton.
The youth, a 17-year-old Briton, was searched and arrested.