The former Duke of York was arrested in February at Marsh Farm in Norfolk on his 66th birthday. He was driven to Aylsham Police Station, where he was questioned for almost 12 hours on suspicion of misconduct in public office, before being released under investigation. Detectives spent days searching Marsh Farm and Royal Lodge, removing documents and other items.
Mountbatten-Windsor has asked a judge to determine whether the force's action towards him was lawful. His legal team is examining whether the search warrants, granted by an Old Bailey judge following an application from Thames Valley Police, were lawful. He lodged an application for permission to judicially review the decision earlier this year, and it was subsequently granted by a High Court judge.
A private hearing at the High Court is scheduled for later this week to decide whether to release certain court documents relating to the judicial review. The case marks the first time a member of the Royal family has challenged the lawfulness of criminal proceedings against them since the trial of Charles I in 1649.