The Prince of Wales has routinely received copies of secret Cabinet papers, it has emerged.
The revelation follows a three-year Freedom of Information battle between the Cabinet Office and the campaign group Republic.
Republic's victory means four chapters of the Cabinet Office's "Precedent Book" have been made public.
They reveal how Cabinet and ministerial committee papers are provided to a "standard circulation" list limited to the Queen, the Prince of Wales and government ministers.
Charles is therefore privy to ministers' discussions on upcoming legislation, which are usually kept secret from the public for 20 years.