- and they would not benefit it they gained them anyway
It has long been surmised that the detention on trumped-up charges of Nazanin Zaghari-Ratcliffe was driven by a desire to extract concessions from the UK government. In addition to those suggested by Mr Ratcliffe, it seems that the extremists want the BBC Persian service to be closed down or to be subject to censorship. BBC has successfully resisted any attempt at direction by government in the past and one can confidently predict that it will continue to do so.
Besides, if the BBC were forced to give in on this, the Saudis would surely demand that objective commentary on the desert kingdom's visceral hatred of Shi'a Islam, manifested in brutal proxy wars, would also cease and probably succeed in those demands. Nor, when the US presidency has turned against them, do Iran's rulers need to antagonise the UK.