Appleby was enfranchised as parliamentary borough in 1295, and abolished by the Great Reform Act of 1832. It returned two Members of Parliament (MPs) using the bloc vote system. It was represented in the House of Commons of England until 1707, in the House of Commons of Great Britain from 1707 to 1800, and finally in the House of Commons of the United Kingdom from 1801 to 1832. Its best-known MP was William Pitt the Younger who became Prime Minister in 1783 at the age of 24.