Campaigners lay stones outside the Foreign Office to mark the 705 days Nazanin Zaghari-Ratcliffe has been imprisoned in Iran

<<CLEAN: Exterior shots of campaigners arranging painted stones outside the Foreign Office to mark the 705 days that Nazanin Zaghari-Ratcliffe has been imprisoned in Iran, and to remind Foreign Secretary Boris Johnson of his promise "to leave no stone unturned" in fighting for her release.>> on March 10, 2018 in London, England.