I understand, but slaves were held in the UK. Some even managed to later write accounts of the experience and how they finally freed themselves. ,Less known than 'Equiano' who was free by the time he came to Britain, was Ignatius Sancho was brought to London as a child slave in 1731 and remained one until at least 1749.
Cheers
Steve
Steve
There are estimated to be up to 25,000 slaves in UK now. They occasionally get free and appear in the press, many of their "owners" have diplomatic immunity.