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In England, following the Peterloo Massacre of August 16, 1819, the British government acted to prevent any future disturbances by the introduction of new legislation, the so-called Six Acts which labelled any meeting for radical reform as "an overt act of treasonable conspiracy". The Parliament of the United Kingdom had reconvened on 23 November and the new acts were introduced by the Home Secretary Lord Sidmouth. By 30 December the legislation was passed, despite the opposition of the Whigs. The acts were aimed at gagging radical newspapers, preventing large meetings, and reducing what the government saw as the possibility of armed insurrection.
The acts were:
- The Training Prevention Act, now known as the Unlawful Drilling Act 1819, (60 Geo. III & 1 Geo. IV c. 1) made any person attending a meeting for the purpose of receiving training or drill in weapons liable to arrest and transportation. More simply stated, military training of any sort was to be conducted only by municipal bodies and above.
- The Seizure of Arms Act (60 Geo. III & 1 Geo. IV c. 2) gave local magistrates the powers to search any private property for weapons and seize them and arrest the owners.
- The Misdemeanours Act (60 Geo. III & 1 Geo. IV c. 4) attempted to increase the speed of the administration of justice by reducing the opportunities for bail and allowing for speedier court processing.
- The Seditious Meetings Prevention Act (60 Geo. III & 1 Geo. IV c. 6) required the permission of a sheriff or magistrate in order to convene any public meeting of more than 50 people if the subject of that meeting was concerned with "church or state" matters. Additional people could not attend such meetings unless they were inhabitants of the parish.
- The Blasphemous and Seditious Libels Act (or Criminal Libel Act) (60 Geo. III & 1 Geo. IV c. 8)",  toughened the existing laws to provide for more punitive sentences for the authors of such writings. The maximum sentence was increased to fourteen years transportation.
- The Newspaper and Stamp Duties Act (60 Geo. III & 1 Geo. IV c. 9) extended and increased taxes to cover those publications which had escaped duty by publishing opinion and not news. Publishers also were required to post a bond for their behaviour
Because of Whig opposition, as well as calmer conditions in Europe, the Six Acts were eventually dropped. Perhaps the one most dangerous to liberty, the Seditious Meetings Prevention Act, was repealed in 1824.
- "Criminal Libel Act 1819 (60 Geo. III & 1 Geo. IV c. 8)", Statute Law Database (SLD), Accessed 11 May 09
- Hollis, Patricia, Class and conflict in nineteenth-century England, 1815-1850, Birth of modern Britain series, International Library of Sociology and Social Reconstruction, Routledge, 1973, ISBN 0-7100-7419-0