D-notice

A D-notice is a formal request used by the UK government to manage sensitive information in the media. It doesn't have legal power but is a way for government officials to advise and request editors not to publish certain details that could compromise national security, ongoing operations, or diplomatic relations. News organizations can choose whether to follow the notice. Essentially, it's a confidential communication aimed at preventing the disclosure of information that could be harmful if made public, balancing transparency with security concerns.