The Brunswick Clubs or Brunswick 'constitutional' Clubs formed the nucleus of an ultimately doomed campaign to deny Catholics the right to enter both houses of the British parliament.
Numbering roughly 200 clubs and claiming 150,000 members, the Brunswicks had a short lifespan. Born in September 1828 when the
Catholic legislation was proposed, they theoretically continued until December 1829.
However, once the bill was passed with a large majority in March 1829, they were in effect dead.
FURTHER READING: The Brunswick Clubs Rise, Contradictions & Abyss by Alan Phylan