British Foreign Secretary Boris Johnson is facing further pressure after Iranian state TV claimed that his statements on the plight of a British-Iranian woman imprisoned in Tehran on charges of espionage confirmed her guilt.

Johnson has already been forced to correct remarks he made to a British parliamentary committee last week, when he said that Nazanin Zagahri-Ratcliffe, who has been in jail since she was detained at Tehran airport in April 2016, had been teaching journalism during her visit to the country.