Lords of Appeal in Ordinary, commonly known as Law Lords, were judges appointed under the Appellate Jurisdiction Act 1876 to the British House of Lords, as a committee of the House, effectively to exercise the judicial functions of the House of Lords, which included acting as the highest appellate court for most domestic matters.

The House of Lords is the upper house of the Parliament of the United Kingdom. Like the lower house, the House of Commons, it meets in the Palace of Westminster in London, England. One of the oldest institutions in the world, its origins lie in the early 11th century and the emergence of bicameralism in the 13th century.