A group of 1,600 Londoners made more in capital gains in 2019 than the entire north of England.
A new report from Tax Justice UK found that the ultra-wealthy made £9bn from assets over the year, while the entire population of the north of England made £8bn.
The report said the findings underscored the need to equalise capital gains and income tax rates.
The chancellor is understood to be considering the move before the budget on 3 March. It could raise £14bn for the public purse and has been recommended by the Office of Tax Simplification.