They have formerly withdrawn from the royalty mess and no longer have any title roll whatsoever. Read it right here somewhere. I only go to two sites besides this one so it must be true.
Met HRH The Price Philip as a formal function in London, I was the only American to be seated at the head table with him and the rest of the VIPs.
We were waiting to be escorted to the dais and HRH said to me:
HRH: “Say, do you know why Bill Clinton wears underpants?”
Me: Ahh. . .no (confused because this was certainly NOT something you expect to be asked by a Royal, or anyone at that).
HRH: “Well, of course, to keep his ankles warm” . . . then he cracked a grin and chuckled.
Awesome!!