Bennett said the man had been in a maximum security prison in the UK for 23 years and claimed “there was a point in time that they were willing to let this guy go”.
He said it was the first sign of a resolution for 18 months, but the government had “seemingly sat on their hands”.
On his mother and step-father’s ordeal, he said: “As the days go on, and the lack of contact continues, we are extremely worried about how they are mentally, physically, going to cope.”
He said getting them home was at the core of everything the family was trying to do.
After the couple’s appeal failed, the case passed to Iran’s Supreme Court, he said, describing the legal process as “opaque”.