It was a simple mistake for a new White House to make. In a press notice heralding the imminent arrival of Theresa May, the “H” from her first name was dropped.

But little did Donald Trump’s aides know they had inadvertently reheated an embarrassment more than a decade old for the Prime Minister.

For ever since Mrs May has entered frontline politics, punters and TV producers have regularly mistaken her for Teresa May - the Page Three model and soft porn actress.