Boris Johnson, the prime minister of Britain says in his upcoming meeting with Hassan Rouhani, the President of Iran, he will demand the release of Nazanin Zaghari-Ratcliffe, the British-Iranian citizen incarcerated in Iran for espionage.

Johnson has been repeatedly asked to take a strong position on Iran’s incarceration of dual citizens.

Nazanin, the 40-year-old mother has been incarcerated in Iran since 2016 on the charge of espionage. She was sentenced to five years in prison.

Before leaving for New York, Johnson told the reporters: “I will not only be discussing Iran's actions in the region, but also the need to release not just Nazanin but others who in our view are being illegally and unfairly held in Tehran.”

Jeremy Hunt, the former foreign minister of Britain advised Johnson to ask his allies in the UN to condemn Iran’s “diplomatic hostage-taking.”

Richard Ratcliffe, Nazanin’s husband says Johnson must tell Rouhani “enough is enough.”

He has described his wife’s incarceration hostage diplomacy: "Nazanin is at the end of her tether. We have to be clear with Iran that it's not OK to conduct hostage diplomacy."

In recent years Iran has incarcerated several dual citizens and foreign citizens who were visiting Iran and charged them with espionage. The last case of it was the Australian blogger couple arrested near Tehran.

Britain and Australia have warned their citizens against traveling to Iran.