The government is considering introducing legislation to remove Andrew Mountbatten-Windsor from the line of royal succession, the BBC understands.
The move, which would prevent Mountbatten-Windsor from ever becoming King, would come after the police investigation has concluded.
The King's brother remains eighth in line to the throne despite being stripped of his titles, including "prince", last October amid pressure over his ties to paedophile financier Jeffrey Epstein.
On Thursday evening, Mountbatten-Windsor was released under investigation 11 hours after his arrest on suspicion of misconduct in public office. He has consistently and strenuously denied any wrongdoing.
On Friday unmarked police cars and vans were seen coming and going at Royal Lodge, the 30-room Windsor property where Andrew lived for many years.
