This week Amnesty International - UK issued two urgent statements:

Novemeber 3, 2021

Please tweet or write to your MP [Member of Parliament] asking them to take action for Nazanin Zaghari-Ratcliffe and Anoosheh Ashoori - British Nationals who have been arbitrarily detained in Iran.
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‍Nazanin Zaghari-Ratcliffe’s husband, Richard Ratcliffe, is on hunger strike outside the Foreign, Commonwealth & Development Office. He is demanding urgent action from the government over his wife’s continued detention in Iran. To help ramp up the pressure on the government and to support Richard’s wellbeing, we’re asking MPs to go and visit him. Will you help by contacting your MP to visit Richard?
https://www.amnesty.org.uk/nazanin-and-anoosheh-write-your-mp

November 5, 2021

Iran: Unjust prison terms for detained dual nationals: Mehran Raoof & Nahid Taghavi

Activists German-Iranian Nahid Taghavi and British-Iranian Mehran Raoof have been arbitrarily detained in Tehran’s Evin prison since 16 October 2020, solely for peacefully exercising their human rights. In August 2021, a Revolutionary Court convicted them of national security related charges and sentenced them to 10 years and eight months in prison, following a grossly unfair trial. Nahid Taghavi is suffering chronic back pain and is denied surgery on her spine, which specialist doctors said she urgently requires. Both are prisoners of conscience and must be immediately and unconditionally released.
https://www.amnesty.org/fr/documents/mde13/4960/2021/en/