The Wikipedia article on slavery in Britain begins with this:
Slavery in Britain existed before the Roman occupation and until the 11th century, when the Norman conquest of Englandresulted in the gradual merger of the pre-conquest institution of slavery into serfdom, and all slaves were no longer recognised separately in English law or custom. By the middle of the 12th century, the institution of slavery as it had existed prior to the Norman conquest had fully disappeared, but other forms of unfree servitude continued for some centuries.
British merchants were a significant force behind the Atlantic slave trade between the seventeenth and nineteenth centuries,[1] but no legislation was ever passed in England that legalised slavery. In the Somerset case of 1772, Lord Mansfield ruled that, as slavery was not recognised by English law, James Somerset, a slave who had been brought to England and then escaped, could not be forcibly sent to Jamaica for sale, and he was set free. In Scotland, colliery (coal mine) slaves were still in use until 1799 where an act was passed which established their freedom and made this slavery and bondage illegal.[2][3]
An influential abolitionist movement grew in Britain during the 18th and 19th century, until the Slave Trade Act 1807 abolished the slave trade in the British Empire, but it was not until the Slavery Abolition Act 1833 that the institution of slavery was to be prohibited in directly administered, overseas, British territories.[4]
Despite being illegal, modern slavery still exists in Britain, as elsewhere, often following human trafficking from poorer countries, but also frequently targeting UK nationals.[5]
