The debt included the main part of the prepayment (and its interest) which Iran had given to Britain for Chieftain tanks which had not been delivered to Iran.

According to verdict of International Chamber of Commerce (ICC) in 1990 and 1996, the UK had been made to pay back its debt while the main part of Iran’s prepayment to Britain was confirmed by the high court in that country in 2019.

However, Britain did not pay it back under the pretext of the European Union sanctions.

An informed source told IRNA that the debt is now in Central Bank of Iran’s account and available for the country.

First, the payback of UK debt to Iran was transferred to Central Bank of Oman, then the Omani bank shifted it to CBI account.

Reportedly, some western media started disseminating reports as of Tuesday morning to connect Nazanin Zaghari’s freedom to the progress achieved in Iran-Britain negotiations on clearing Britain old debt to Iran.