Iran has released British-Iranian aid worker Nazanin Zaghari-Ratcliffe from house arrest at the end of her five-year prison sentence, but she has been summoned to court again on another charge, her lawyer said on Sunday. British Prime Minister Boris Johnson said his government would continue to do everything possible to secure her permanent release so she could return to the UK. Zaghari-Ratcliffe, a project manager with the Thomson Reuters Foundation, was arrested at a Tehran airport in April 2016 and later convicted of plotting to overthrow the clerical establishment.