As much as I wish I could believe you, I know that is not the case. For one thing, the British monarchy website is unreliable; I have found many errors of fact on it. For example, Prince George of Cambridge was listed as being born on October 23, 2013. Uh, no, he was born July 22, 2013 and christened October 23rd. Albert and Leopold Windsor are listed in the line of succession to the throne. Unfortunately they are also Catholic and under the Act of Settlement 1701 are like their father Lord Nicholas and grandfather Prince Michael of Kent, disbarred from the throne, so thusly there is no earthy way they can be in the line of succession to the British throne. They are in the line of succession for the Dukedom of Kent but I won't hold my breath waiting for either to secede. Doubtlessly there are other errors on the site that I can't recall and that haven't been discovered yet. But I have seen letters patent naming the Duke of Edinburgh as a Counsellor of State. In order for him to be listed, he had to stay behind, as under the terms of the Regency Act 1943, those Counsellors who are absent or accompanying Her Majesty are not listed among those acting. I will try to dig up the Letters Patent listing the Counsellors of State from the 1960s and 1970s.
My question is, who is staying behind to mind the store? Are either Prince Henry of Wales or the Duke of York accompanying the Queen or will either be out of the country for any period of time when she is not or a more senior member isn't named? Because if so, then amended legislation to the Regency Acts will need to be passed before Her Majesty leaves for France.