Deal to free Nazanin Zaghari-Ratcliffe was agreed last year but fell through Britain reached an agreement with Iran last summer to repay a £400 million debt to secure the release of Nazanin Zaghari-Ratcliffe, but the deal collapsed, MP Zaghari-Ratcliffe ‘angry at her life being stolen’ after deal for release collapsesCharity worker’s husband demands transparency from No 10 amid fears she is being used as ‘bargaining chip’ in nuclear talks