![Mehran Raoof has been held at Evin Prison in Tehran since October 2020. Supplied/Alamy](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/SDEDB7YNIE2IKFVQIHTHBKDE5I.jpg?smart=true&auth=17a416541a8fcbb58cec4921e555c61e613b6bb0f3f3ca8de255649a6888b1ac&width=400&height=225)
Mehran Raoof has been held at Evin Prison in Tehran since October 2020. Supplied/Alamy
Mehran Raoof has been held at Evin Prison in Tehran since October 2020. Supplied/AlamyBritish dual-citizen held in solitary confinement in Iran's Evin jail after surveillance operation
Friends say security agents who bugged meetings in Tehran cafe swooped on Mehran Raoof, 64, in October