King Charles has reportedly ordered Andrew Mountbatten-Windsor not to use money provided by the monarch to finance his legal action against Thames Valley Police.
The former Duke of York is challenging search warrants used during raids on his current home on the Sandringham Estate and his former residence, Royal Lodge in Windsor.
A palace source said the legal action was entirely a matter for Andrew and his lawyers and that money provided by Charles must not be used to fund it.
Andrew challenges police search warrants
Andrew has applied for a judicial review examining whether warrants obtained by Thames Valley Police from the Central Criminal Court were lawful.
The warrants authorised searches of two properties following his arrest on suspicion of misconduct in public office on 19 February 2026, his 66th birthday.
Andrew was interviewed under caution for approximately 11 hours before being released under investigation without charge.
His legal challenge seeks to have the warrants quashed. If successful, the ruling could affect whether evidence obtained during the searches may be used in any future prosecution.
No criminal charges have been brought against Andrew, and he denies wrongdoing.
King distances himself from lawsuit
Charles reportedly provides his younger brother with a private allowance to help cover living and security costs following his departure from royal duties and move away from Royal Lodge.

However, the King has insisted that the money must not be used to finance Andrew’s court challenge.
The funding comes from the monarch’s private resources rather than public money.
Buckingham Palace is also understood to have no involvement in Andrew’s legal strategy or decision to challenge the police.
Following Andrew’s arrest, Charles said he was deeply concerned but stressed that the investigation must be allowed to proceed independently.
“The law must take its course,” the King said while promising the Royal Family’s support and co-operation with the authorities.
Investigation linked to Epstein files
Thames Valley Police are investigating allegations that Andrew shared sensitive information with convicted sex offender Jeffrey Epstein while serving as the UK’s special representative for international trade and investment.

The investigation began following the release of material under the Epstein Files Transparency Act in the United States.
Police previously confirmed that officers were working with the US Department of Justice and seeking advice from the Crown Prosecution Service.
Andrew has consistently denied wrongdoing relating to his association with Epstein.
Private High Court hearing scheduled
A private High Court hearing is scheduled for Thursday, 8 October, at 2pm before Mr Justice Hilliard.
The hearing is expected to consider Thames Valley Police’s request to restrict public access to documents connected to Andrew’s legal challenge.
It is not known whether Andrew will attend.
Thames Valley Police confirmed that its misconduct investigation remains active and that it is involved in legal proceedings concerning warrants obtained from the Central Criminal Court.
The force said it would be inappropriate to comment further while those proceedings continue.
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