The main concern raised in the text is the potential censorship of secret documents relating to the late Queen Elizabeth II and Prince Philip scheduled for release in 2026 and 2027. Experts worry that these documents, which may detail significant events during her reign, could be withheld due to national security concerns, diplomatic sensitivities, or information deemed damaging to the royal family. The text highlights the existing secrecy surrounding government documents and royal family archives, and calls for increased transparency in the public release process.