Iran summoned Britain's ambassador to Tehran on Wednesday after London designated the Islamic Revolutionary Guard Corps (IRGC) under the UK's ‌Countering ⁠State ⁠Threats Act, warning the move would "not go unanswered," the Iranian foreign ministry said in a statement carried by Tasnim news agency.The move ⁠came a ‌day after ​Britain ​summoned Iran's Charge d'Affaires ⁠Ali Nasimfar in London over ​what the UK government ​said was Iran's role in directing proxy groups to carry out attacks across Europe in ‌recent months.Britain on Monday designated the IRGC and ​a ​linked ⁠group as a security threat under new powers aimed at preventing ​foreign states from using proxies for activities such as surveillance and sabotage.