Ministers are under growing pressure to ban Iran's top religious military organisation amid a growing confrontation with Tehran.
More than 550 MPs and peers have signed a letter calling for the 125,000-strong Islamic Revolutionary Guards Corp to be outlawed in the UK over the hardline regime's so-called 'hijab and chastity law'.
The Islamist government in Iran is facing a major rebellion against its conservative ideology and is clamping down with an attack on women who dared to remove their headscarves.
In the letter, whose signatories include Tories Sir Iain Duncan Smith and Suella Braverman, and Labour's Lord Kinnock, the politicians say the 'mandatory hijab (is) suppressing women who lead the protest and resistance movement to prevent future uprisings'.
'Appeasing this faltering regime betrays democratic values, emboldens its repressive policies, and undermines global security as Tehran continues its nuclear ambitions and terrorism,' it added.
