Michael Fawcett has lost weight and gained a few grey hairs since quitting royal service, and the double-breasted suits that were once his sartorial trademark are now confined to their wardrobe.
Probe follows revelation Mr Fawcett allegedly offered to help a Saudi billionaire upgrade his honorary CBE to a knighthood in exchange for donations to Charles s charitable foundation.
The BBC journalist, 77, has insisted it is extraordinarily unlikely the Prince of Wales knew one of his charities may have been helping a Saudi billionaire get a knighthood and British citizenship.
The Duke of Sussex was accused of throwing his father under the bus after claiming he raised concerns about a Saudi billionaire donor. Charles senior aide Michael Fawcett later quit.