Riot Act felt uncertain of their power to take action to stop the riots without a reading of the Riot Act. After the riots, Lord Mansfield observed that the Riot Act did not take away the pre-existing power of the authorities to use force to stop a violent riot; it only created the additional offence of failing to disperse after a reading of the Riot Act. The Riot Act was read prior to the Peterloo Massacre of 1819, as well as prior to the Bristol Riots at Queen's Square in 1831. Both are held to be related to the Unreformed House of
Peterloo Massacre cabinet that winter. By the end of the year, the government had introduced legislation, later known as the Six Acts, to suppress radical meetings and publications, and by the end of 1820 every significant working-class radical reformer was in jail; civil liberties had declined to an even lower level than they were before Peterloo. Historian Robert Reid has written that "it is not fanciful to compare the restricted freedoms of the British worker in the post-Peterloo period in the early nineteenth century with those of the black South African in the post-Sharpeville period of the late twentieth century." One direct