Of course, this is The Guardian:
Citing calculations made in a report by the Brattle Group, which factors in the wealth and GDP amassed by countries that enslaved African people, she set out that the UK owes $24tn in reparations to 14 countries affected by transatlantic slavery, Spain owes $17.1tn, France owes $9.2tn and the Netherlands owes $4.86tn.
How do you amass GDP? It’s a flow, it’s what is created this year. It’s not a stock at all, it’s the value added by activity this year. If everyone stopped doing stuff then GDP would be zero – you cannot amass it.