Abramovich was sanctioned by the UK government in March 2022 over alleged links to Russian president Vladimir Putin – something he has denied.

He was granted a special licence to sell Chelsea following Russia’s invasion of Ukraine, providing he could prove he would not benefit from the sale.

The 58-year-old said funds from the sale would be donated via a foundation “for the benefit of all victims of the war in Ukraine”, which would include those in Russia.

The £2.5bn in proceeds have been frozen in a UK bank account since the sale – Abramovich does not have access to the money but it still legally belongs to him.

In 2023, the BBC reported that leaked documents revealed a money trail linking Abramovich to two men dubbed “wallets” of Putin.

BBC Newsnight, BBC Verify and Panorama partnered with the Bureau of Investigative Journalism to uncover the revelations as part of Cyprus Confidential – a global investigation led by reporters at the International Consortium of Investigative Journalists (ICIJ) and Paper Trail Media.

The reports alleged that the leaked documents from Cyprus revealed new evidence linking the former Chelsea owner to a secret £26m deal in 2010.

Abramovich has previously denied any financial relationship with the Russian leader.

In June, the Government threatened to sue Abramovich to make sure the money from the Chelsea sale goes to Ukrainian humanitarian aid – rather than “all victims of the war in Ukraine” as Abramovich had said.

Two months before selling Chelsea in May 2022, Abramovich was said to have suffered from suspected poisoning at peace talks on the Ukraine-Belarus border.

The Russian billionaire, who made his fortune in oil and gas, was reported to have a role as a broker in talks between Ukraine and Russia.