The Middlesex Guildhall is a court building in Westminster which houses the Supreme Court of the United Kingdom and the Judicial Committee of the Privy Council. The building stands on the south-western corner of Parliament Square, near the Palace of Westminster. In 1970, the historic building was listed Grade II*.

The Supreme Court of the United Kingdom is the final court of appeal in the United Kingdom for all civil cases, and for criminal cases originating in England, Wales and Northern Ireland. As the United Kingdom’s highest appellate court for these matters, it hears cases of the greatest public or constitutional importance affecting the whole population.