Nazanin Zaghari-Ratcliffe has had her UK passport returned to her – raising hopes she could be on the verge of release. But how did a charity worker end up being accused of plotting to topple the Iranian regime, and why is she still battling for her freedom? Report by Burnsla. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn