Cato Street Conspiracy

In 1820 the Cato Street Conspirators, led by Arthur Thistlewood, became the last persons to be beheaded by ax in England. Having plotted to murder members of the government, they were found guilty of high treason and hanged, and their corpses were then decapitated.

…unrest in England, organized the Cato Street Conspiracy to assassinate all the members of the British Cabinet.