  As you may know, The Guardian is to take legal action to overturn a court injunction preventing them from naming a royal servant who was alleged to have been caught having 'relations' with a senior royal. Apropos to nothing, here's an old news story: The Sunday Mirror Sunday, March 16, 2003 Princess Diana made a sensational secret video diary in which she complained that Charles had an "unhealthy relationship" with top aide Michael Fawcett, the Sunday Mirror can reveal. Diana, looking tearful and drawn, complains on camera: "He is too close to Fawcett - what can one do when your husband is in an unhealthy relationship" with a servant? She also tells how Charles and his close aide appeared "uncomfortable" and "uneasy" after being disturbed while together in one of the Prince's private rooms. 
