Ms. Zaghari-Ratcliffe is one of dozens of dual nationals being held in Iran, several of them from Britain. Under Iranian law, dual nationals are considered Iranian citizens only, and so fully subject to Iranian courts.
Speculation has grown in recent months that the detention of the Britons may be tied to a longstanding legal dispute over Iran’s 1976 purchase of British tanks that were never delivered. Britain has acknowledged that it owes Iran up to 300 million pounds, a little over $400 million at current exchange rates, but says that the precise sum remains to be negotiated.
Mr. Ratcliffe, who has been campaigning for his wife over the past two years, said in the statement that Ms. Zaghari-Ratcliffe had been allowed a telephone call with the British ambassador to Iran on Sunday, her first phone call with a British diplomat since her arrest.
“We are grateful to the prison authorities for finally allowing this contact,” Mr. Ratcliffe said.
He also said that his wife had asked the judge for clemency and for a furlough to celebrate her daughter’s birthday in June. The couple’s child, Gabriella, is staying with Ms. Zaghari-Ratcliffe’s parents in Tehran and is not allowed to leave the country.