The KC wrote: "I have reached the clear conclusion that this examination should not have happened, and that additional safeguards are needed to ensure it is not repeated.
"In my view, based on the information provided, police both could have decided not to exercise the power, and should have decided not to exercise the power," he added. They said officers told Mr Moret, who works as a foreign rights manager, he had taken part in demonstrations about President Emmanuel Macron raising the retirement age from 62 to 64 in France.
Cdr Dominic Murphy, who leads the Met's counter-terrorism command, said: "Schedule 7 is an important power in protecting the borders of the UK and remains a vital tool in our efforts to counter the terrorist threat and keep the public safe.