Writing in the Telegraph, he said the tours often seemed “ridiculous affairs”, mainly due to the reaction to the Queen’s presence.
He revealed officials would “tie themselves in knots” over some arrangements, especially where plumbing was concerned.
“Hosts spend more time worrying about the loo arrangements than anything else, down to what colour the towels should be and whether the loo roll is a suitable brand.”
In his article, Gordon Rayner also revealed there is a “retiring room” designated for the Queen and Prince Philip to use while on tour, which doubles as a panic room.
And while Palace aides ensure there is always a toilet for Her Majesty to use, it's Queen Elizabeth who brings the paper, he said.