BBC Media correspondent Torin Douglas: "This is a warning shot to the press"

The teenage son of the Prince of Wales, celebrating his birthday at the weekend, had made a formal complaint to the Press Complaints Commission over the supplement in the Mail on Sunday newspaper.

It includes details of aides allegedly vetting Prince William's friends before invitations to tea. But it was described by Buckingham Palace as inaccurate and intrusive.

Lord Wakeham, chairman of the industry watchdog, said the matter had been resolved.

He said: "This matter has now been swiftly and amicably resolved between the newspaper and the Palace in line with the standard procedures of the Press Complaints Commission.

"I am satisfied that there is therefore no need for any further action by the PCC."

Complaint ahead of birthday

Photographers: Warned not to intrude

A spokeswoman for Buckingham Palace described the supplement as "grossly intrusive and inaccurate", accusing the newspaper of dealing in "complete fabrication".

The Royal Family also objected to speculation about what the Prince felt as he neared his 16th birthday and "silly comments" about girls.

"We object to its intrusive nature, what William may be thinking, what William's bedroom might be like," said the spokeswoman.

"There are untrue allegations."

Complaint tests PCC's mettle

Mail on Sunday: Settled potential row

The PCC has little real power but the complaint was a test of the beefed-up privacy regulations protecting children, brought in after the death of the Prince's mother, Diana, Princess of Wales, last year.

After Princess Diana's death the Royal Family appealed to the press to respect the privacy of William, at school at Eton, and his younger brother, Harry.

Lord Wakeham praised newspapers for their "exemplary" behaviour in respecting Prince Williams's privacy at school.

But he warned editors to continue to respect the code of conduct as the prince gets older.