Nazanin Zaghari-Ratcliffe has said it should never have taken the UK government so long to secure her release from prison in Iran.
She told a news conference she had been overwhelmed with emotion to be reunited with her husband and daughter, describing the reunion as precious. But she said "what’s happened now should have happened six years ago".
The British-Iranian was speaking for the first time since her dramatic return to the UK last week.
Mrs Zaghari-Ratcliffe was arrested on spying charges while visiting her parents in Iran, with her then two-year-old daughter Gabriella, in April 2016. Last week, she was freed after spending six years in detention.
Her release came after the UK government paid a £400m debt to Iran dating back to the 1970s, although both governments have said the two issues should not be linked.
Huw Edwards presents BBC News at Ten reporting by diplomatic correspondent Caroline Hawley.
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