The new sanctions were imposed on 18 people and 19 entities. Those targeted cannot travel to the EU, and any assets they hold inside the bloc can be frozen.

Britain also imposed sanctions on more Iranian individuals and entities over the country’s “brutal repression” of its people.

The sanctions included an asset freeze on Iranian deputy prosecutor general Ahmad Fazelian, who the British foreign office said was responsible for an unfair judicial system that used the death penalty for political purposes.

Others also sanctioned by Britain include Kiyumars Heidari, commander in chief of Iran’s ground forces; Hossein Nejat, deputy commander of the IRGC; and the Basij Resistance Force and its deputy commander, Salar Abnoush.

The Basij Cooperative Foundation, linked to the Basij militia, and Qasem Rezaei, deputy commander of Iran’s law enforcement forces, were also sanctioned.

Britain has now imposed 50 new sanctions against Iran since Amini’s death, the foreign office said.

Washington has accused the IRGC of continuing to aggressively crack down on peaceful demonstrations and said it has played “a leading role in suppressing protests through extensive human rights abuses”.

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The IRGC was set up shortly after the 1979 Islamic Revolution to protect the Shiite clerical ruling system. It has an estimated 125,000-strong military with army, navy and air units, and commands the Basij religious militia often used in crackdowns.

The US Treasury described the IRGC Cooperative Foundation – already under US sanctions – as an economic conglomerate established by senior officials of the group to manage its investments and presence in sectors of Iran’s economy.

The Treasury accused the foundation of having become “a wellspring of corruption and graft” and said funds from it have supported the IRGC’s military adventures abroad.

“Along with our partners, we will continue to hold the Iranian regime accountable so long as it relies upon violence, sham trials, the execution of protesters, and other means of suppressing its people,” the Treasury’s under secretary for terrorism and financial intelligence, Brian Nelson, said in a statement.

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Some EU governments and the European Parliament have made clear they want the IRGC as a whole added to the bloc’s list of terrorist organisations. But the EU’s foreign policy chief, Josep Borrell, noted that could only happen if a court in an EU country determined the IRGC was guilty of terrorism.

Iran’s long-strained relations with the West have deteriorated since talks to revive its 2015 nuclear deal deadlocked and after Tehran unleashed the crackdown on protesters last year. The ties have also been strained by its support for Russia in Ukraine, where Western states say Moscow has used Iranian drones.