Leading European banks are booking around €20bn (£17bn) a year – equivalent to 14% of their total profits – in tax havens, with Barclays, HSBC and NatWest Group among those enjoying the lowest tax rates, according to a new report.

The figures emerge from an analysis, conducted by the EU Tax Observatory, of 36 big banks required to publicly report country-by-country data on their activities.

The slave trade was abolished in the British Empire in 1807 but it was not until 1833 that the Slavery Abolition Act finally banned the ownership of other human beings. However, 46,000 slave owners continued to benefit financially as the subsequent Slave Compensation Act provided £20m in payments – a sum worth billions in 2020 terms. Despite the name of the act, the former slaves were not compensated.

University College London’s Legacies of British Slave Ownership project shows that 10% to 20% of Britain’s wealthy can be identified as having had significant links to slavery. The amount of money borrowed to pay off slave owners was so large that the government only repaid it fully in 2015. Companies with links to slavery in their past include: