According to an invitation to the event seen by MEE, Pahlavi is set to brief MPs and peers on “the ongoing situation in Iran and his plan for the collapse of the current regime and for a stable transition to a secular democracy”.

Akehurst told MEE: “It is for the Iranian people to decide what type of government they want, but clearly MPs are going to be interested in hearing what different opposition voices have got to say about the future of such an important country.”

As a staunch defender of a US-backed monarchy that he hopes to bring back to Iran, he has made several visits to Israel, taken photographs with Prime Minister Benjamin Netanyahu and cast himself as the only viable leader of a modern Iran if the Islamic Republic collapses.