UCL - Slave-Owner Reparations Database
Map: https://www.ucl.ac.uk/lbs/maps/britain/#zoom=4&lng=-4.000000&lat=54.500000
On the payment of reparations until 2015: https://fullfact.org/economy/slavery-abolition-act-loan/
National Archive (UK) Currency Converter: https://www.nationalarchives.gov.uk/currency-converter/