Like most folks in America, I didn't know who the Prime Minister was until recently, much less what to call her.
President Trump just referred to her as Prime Minister May in his press conference while thanking her for her warm support. What should he have called her, Mrs. May?
I remember flying into RAF Valley in the late 1970's with a Navy plane. The RAF pilots chided us because we let women be Naval Aviators even though their PM or whatever she is called was a woman.