UK Prime Minister, Boris Johnson, has called for Nazanin Zaghari-Ratcliffe, the British-Iranian woman jailed in Iran on spying charges, to be released "permanently" so she can be reunited with her family in Britain. She has had her ankle tag removed at the end of her five-year sentence.

However, her husband Richard Ratcliffe has been told a new court case against her is scheduled for next Sunday. The PM said he was pleased about her tag, but her continued confinement remains totally unacceptable. He wrote in a tweet: "She must be released permanently so she can return to her family in the UK, and we continue to do all we can to achieve this."

The charity worker had been under house arrest in Tehran since being moved from jail last March. She has always denied the charges against her. Speaking after her ankle tag was removed, Mr Ratcliffe said: “It was a mixed day for us and Nazanin is genuinely happy to be free of her electronic bracelet.

"I'm a bit more guarded - it feels to me like they have made one blockage just as they have removed another, and we very clearly remain in the middle of this government game of chess." He said that his wife had gone to see her grandmother and was determined to enjoy the afternoon and not think about what it all means. "I don't think we expected something clean but how muddy this is I'm not quite sure yet," he said.

Earlier, Foreign Secretary Dominic Raab said Iran is continuing to put her and her family through a cruel and an intolerable ordeal. Mrs Zaghari-Ratcliffe, 42, had been out of prison since last spring due to the coronavirus pandemic but had been confined to her parents' house. Her sentence was due to end on Sunday.

She was arrested in April 2016 while travelling to visit her parents in Iran with her young British-born daughter, Gabriella, who is now six years old. The dual national was sentenced to five years in prison over allegations of plotting to overthrow the Iranian government, which she denies.

She has not yet had her British passport returned to her, according to Tulip Siddiq, the Labour MP for the Hampstead and Kilburn constituency in London where her family live.

"She does have to go back to court and we don't know what awaits her there,” Ms Siddiq said. However Ms Siddiq said the removal of her ankle tag meant she could visit her elderly grandmother - which is the thing she mentions every time I speak to her".