What is the history behind the British monarch’s famous red box?

While all government boxes are embossed with the royal cypher, the queen’s personal box carried the words "The Queen.” Photo: Barrow Hepburn & Gale

King Charles III is likely to receive important documents in the famous red boxes used by the monarch and British government ministers.

The boxes, made by British leather goods company Barrow Hepburn & Gale, contain a range of papers, including those that require a signature, briefing documents and information about forthcoming meetings.