This article by Nazanin's husband, Richard Ratcliffe, is worth a read. The UK's role is rarely discussed:

"As Iran sentences Nazanin Zaghari-Ratcliffe to a further two years in Iran, her husband outlines why the UK’s secretive, unaccountable arms trade is a danger to British citizens and why his family remains haunted by an unkept promise made by the UK government."

https://www.dailymaverick.co.za/article/2021-05-01-nazanins-...