Police were granted search warrants and searched premises in St. Helier allegedly linked to Mr Abramovich in April this year, seizing documents and devices.

According to Reuters, those warrants were then challenged in court by the companies searched.

The news agency said it had seen a legal document, confirmed by two sources, containing an acknowledgment that “the search warrants were obtained unlawfully’ and agreeing ‘that the search warrants should be quashed”.

The reports claim that police also agreed to pay damages and costs, confirmed that all copies of documents seized in the searches had been destroyed and pledged to apologise to Mr Abramovich.

A spokesperson for the Russian billionaire said: “Mr Abramovich has always acted in accordance with the law, we are pleased that the Jersey police have conceded in relation to these unlawful and unfounded searches.”

Following the raids in April, more than $7bn-worth of assets suspected to be connected to Mr Abramovich were frozen by the Royal Courtby means of a formal court order, known as a saisie judiciaire.

A spokesperson for States of Jersey Police said the Force was unable to comment.

Express understands that the investigation has been carried out by the Economic Crime and Confiscation Unit, which is based within the Law Officers’ Department and utilises the services of officers seconded from States of Jersey Police.

In a statement, the Law Officers Department said it was “unable to comment on live investigations”.

However, it confirmed that “the saisie judiciaire imposed on 12 April 2022 remains in force.”

A spokesperson for Jersey Finance said it would “not be appropriate” to comment.

Express and the JEP have asked requested access to the Royal Court files relating to the case. The Royal Court said that it would seek representations from all parties involved before disclosing any documents.

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