The left behind: the dual nationals still in jail in Iran

Anoosheh Ashoori and Nazanin Zaghari-Ratcliffe are free but other families in the west are waiting anxiously

Dotted across Europe and America are families of as many as 17 dual nationals still held in jail in Iran, watching nervously to find out whether their loved ones will follow Anoosheh Ashoori and Nazanin Zaghari-Ratcliffe on a plane to freedom, or be left behind.

Many fear their freedom is not being made a precondition of the west agreeing a nuclear deal with Iran in the talks nearing a climax in Vienna. Without an acknowledged debt to repay like the UK's, some of their countries may have trouble striking deals, and that worries the families.