LONDON (Reuters) - Britain on Monday described Iran’s decision to bring a new case against detained British-Iranian aid worker Nazanin Zaghari-Ratcliffe as appalling and said she should be allowed to return home to rejoin her family. The British government summoned the Iranian ambassador last week after the news that Zaghari-Ratcliffe was to be recalled to court in Iran. “It is appalling that Iran has begun a new case against Mrs Zaghari-Ratcliffe and have threatened her with being returned to prison. The Iranian authorities have put an intolerable burden on Nazanin and her family,” British foreign minister Dominic Raab said in a statement. “I am relieved she remains on temporary release, but she needs to be returned home to her family. We continue to make this clear in the strongest terms.” A project manager with the Thomson Reuters Foundation, the dual national was arrested in April 2016 at a Tehran airport as she prepared to head back to Britain with her daughter after a family visit. She was sentenced to five years in jail after being convicted of plotting to overthrow Iran’s clerical establishment. Her family and the foundation, a charity that operates independently of media firm Thomson Reuters and its news subsidiary Reuters, deny the charge.