Britain’s charity watchdog agency has dismissed a complaint charging that Prince Charles used his architectural charity for political lobbying, the Press Association reports.

The Charity Commission said it accepted assurances from trustees of the Prince’s Foundation for the Built Environment that they were not pressured by Prince Charles to intervene in a London planning dispute. An antimonarchy organization had filed the complaint after the owners of a major residential development withdrew a planned modernist design the prince had criticized.

BBC News reports that Charles’s sons have expanded their charity work. The Princes’ Charities Forum, founded by William and Harry three years ago with a handful of organizations, now meets twice a year and has grown to 20 members that receive patronage from one of the princes.