High Quality Content by WIKIPEDIA articles! The British (also known as Britons, informally Brits or Britishers) are citizens of the United Kingdom, of the Isle of Man, any of the Channel Islands, or of any of the British overseas territories, and their descendants.British nationality law governs modern British citizenship and nationality, which are acquired, for instance, by birth in the UK or by descent from British nationals. When used in a historical context, the term British people refers to the ancient Britons, the indigenous inhabitants of Great Britain south of the Forth.