how long did slavery last bbc
British and Foreign Anti-Slavery Society Â© In the space of some 46 years, between 1787 and 1833, Britain had not only outlawed the slave trade but also abolished slavery throughout her colonial possessions.For many the struggle was over. For others, however, 1833 signalled a new beginning.ntroduction. British anti-slavery was one of the most important reform movements of the 19th century. But its history is not without ironies. During the course of the 18th century the British perfected the Atlantic slave system.