In 1833, slavery was abolished in the British Empire, and slave-owners in the British Caribbean colonies were compensated financially for the loss of their property. University College London has a project to document the Legacies of British Slave-Ownership. There is a searchable database at https://www.ucl.ac.uk/lbs/search/ . Sad to say that there are several Portuguese names listed (including my own Belinfante family in Jamaica and Barbados). But IMO, this method of resolving the problem was infinitely preferable to the Civil War in the USA over the same issue, which resulted in 600K+ deaths some 30 years afterwards