The British (also known as Britons, informally Brits, or archaically Britishers) are citizens of the United Kingdom, of the Isle of Man, one of the Channel Islands, or of one of the British overseas territories, and their descendants.[22][23][24] In a historical context, the term refers to the ancient Britons, the indigenous inhabitants of Great Britain south of the Forth.[23] 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.