Pressure on Iran is intensifying beyond the battlefield as the European Union formally designates the Islamic Revolutionary Guard Corps (IRGC) as a terrorist organisation—prompting fears that the United Kingdom could follow next. The Starmer government is reportedly preparing steps to proscribe the IRGC, a move that would significantly expand police powers and deepen diplomatic fallout with Tehran. Iran has responded with its sharpest warning yet to Europe, calling the EU decision a “strategic blunder” and accusing Brussels of acting under pressure from Washington and Tel Aviv, as geopolitical tensions with Iran continue to escalate on multiple fronts.