The Plumbers Arms is a Grade II listed public house at 14 Lower Belgrave Street, Belgravia, London SW1.
It is where Lady Lucan burst into on the evening of 7 November 1974, covered in blood and fearing for her own life, after discovering that her husband, Lord Lucan, had murdered their nanny, Sandra Rivett.
It was built mid-19th century.
Coordinates: 51°29′48″N 0°08′51″W / 51.496535°N 0.14754668°W