UK imposes sanctions on Iran after execution of British-Iranian national Alireza Akbari

Prosecutor general punished as smuggled recording released of Akbari saying he was subjected to 3,500 hours of torture'

• Iran executes British-Iranian national Alireza Akbari accused of spying

Britain has imposed sanctions on the Iranian prosecutor general after the country's execution of the British-Iranian dual national Alireza Akbari, while Iran has summoned the UK ambassador.

Akbar was executed on Saturday after Iranian authorities claimed he was an MI6 spy, charges his family and the Foreign Office deny.