British-Iranian aid worker Zaghari-Ratcliffe freed by Tehran

Tehran has released British-Iranian aid worker Nazanin Zaghari-Ratcliffe, removing her ankle tag after a five-year prison sentence.

She was jailed for plotting to overthrow the clerical establishment.

"She was pardoned by Iran's supreme leader last year, but spent the last year of her term under house arrest with electronic shackles tied to her feet. Now they're cast off," her lawyer and a British lawmaker said on Sunday.

A hearing for Zaghari-Ratcliffe's second case has been scheduled on March 8.

Zaghari-Ratcliffe, a project manager with the Thomson Reuters Foundation, was arrested at a Tehran airport in April 2016 as she prepared to head back to Britain with her daughter after a family visit.

She was later sentenced to five years in jail after being convicted of plotting to overthrow Iran's clerical establishment. She was released from jail in March last year and put under house arrest in Tehran in response to concerns about the spread of COVID-19 in Iran's prisons, but her movements were restricted and she was barred from leaving the country.

British foreign minister Dominic Raab welcomed her release but said Iran's continued treatment of her remained "intolerable".

British lawmaker Tulip Siddiq said she had spoken to Zaghari-Ratcliffe's family and that they told her she had had her ankle tag removed, but has been summoned again to court.

"I have been in touch with Nazanin's family. Some news: 1) Thankfully her ankle tag has been removed. Her first trip will be to see her grandmother. 2) Less positive - she has been summoned once again to court next Sunday," Siddiq, who is the member of parliament for where Zaghari-Ratcliffe used to live, said on Twitter.