Large staff meetings — called by the Queen’s private secretary Sir Christopher Geidt and the Lord Chamberlain, who runs the royal household — do happen periodically. There is some speculation that it could be about the Queen, who is 91, or Prince Philip, 95, standing down from some of their public duties.
A Buckingham Palace spokesman declined to comment.
Prince Philip was at an event in London on Wednesday, where he helped open the new Warner Stand at Lord’s Cricket Ground.
This article originally appeared on PEOPLE