Fake or Fortune? S07E04 - A Double Whodunnit

Fiona Bruce and Philip Mould investigate two rare portraits of black British subjects from the 18th and 19th centuries. Painted with extraordinary skill and sophistication, both pictures are highly unusual in their positive depiction of black sitters at a time when Britain was still heavily engaged in slavery. But this is also an intriguing double whodunnit. Who are the artists who broke with the conventions of the time to paint these exceptional works?