Cato Street Conspiracy was a plot to murder the Cabinet (leaders of government) of the United Kingdom in 1820. The leader of the plot, Arthur Thistlewood, had just been released from imprisonment after the Spa Fields Riot of 1816. The conspirators planned to surprise and kill the Cabinet at a meeting. They planned then to seize the Bank of England and the Mansion House, the official residence of the lord mayor of London, and to declare a provisional government. One of the conspirators, a man named George Edwards, informed the government of the plot. The conspirators were arrested at their meeting place in Cato Street, near Marble Arch, London, before they could put their plan into operation. Thistlewood and four others were hanged.
