The 1831 Bristol riots took place on 29–31 October 1831 and were part of the 1831 reform riots in England. The riots arose after the second Reform Bill was voted down in the House of Lords, stalling efforts at electoral reform. The arrival of the anti-reform judge Charles Wetherell in the city on 29 October led to a protest, which degenerated into a riot. The civic and military authorities were poorly focused and uncoordinated and lost control of the city. Order was restored on the third day by a combination of a posse comitatus of the city's middle-class citizens and military forces.
Much of the city centre was burnt, up to £300,000 of damage caused and up to 250 casualties incurred. The city's mayor Charles Pinney was tried for failing to prevent the riot and acquitted. The military commander, Lieutenant-Colonel Thomas Brereton was court-martialled on a similar charge though killed himself before his trial was concluded.[1] A renewed third reform bill passed in 1832, as the Great Reform Act, introducing sweeping changes to the electoral system. Local government in Bristol was likewise reformed with the passing of the Municipal Corporations Act 1835.