Iran's ambassador faces UK officials, after the British-Iranian is told she may be sent back to jail.
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Video caption: Nazanin Zaghari-Ratcliffe: Boris Johnson must be brave over jailed Briton, says husband Richard Ratcliffe will meet Boris Johnson later to discuss efforts to bring his wife home from Iran.
By Jonathan Beale
Defence Correspondent
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Video caption: Nazanin Zaghari-Ratcliffe: Explaining the politics Why one mother's personal plight is part of a long and complicated history between Iran and the UK.
By Claire Gilbody-Dickerson
BBC News