Are flags only lowered for royalty? Here in the US we go half mast for every Tom, Dick, and Harry.
"The Union Flag above Buckingham Palace is NOT flying at half-mast, as of March 18. Various live shots from outside the Palace prove that the photo going viral is clearly out of date and the flag is flying at its usual full mast at present. i.e. the Royal family is not in mourning and, as far as we know, the King and the rest of his relatives are doing fine."
The flag was never lowered. Internet trolls on X were posting old photos. Some foreign newspapers published the fake photos.