Editorial opinion: "The anger expressed last week by the Labour MP Tulip Siddiq over the government’s failure to secure the release from Iran of her wrongly accused constituent Nazanin Zaghari-Ratcliffe is fully justified. This distressing case has dragged on for too long. Again and again since Zaghari-Ratcliffe’s arrest in 2016, ministers have hinted at progress, only for hopes to be dashed. Now she has been condemned to a further year in jail. This is outrageous. Yet what does the government do? Nothing that makes a difference."