Updated

British officials, including Prime Minister (referred to as PM) Andy Burnham, said the UK assessed that Iran's Revolutionary Guard Corps was 'almost certainly' behind a suspected plot/security incident at RAF Fairford air base late last month, marking the firmest UK attribution yet. The UK responded by sanctioning two Iranian nationals, summoning Iran's ambassador, and vowing further sanctions and a crackdown on Iranian criminal networks operating in Britain, amid broader warnings that the incident reflects Iran's desire to demonstrate it can pose a threat inside the UK. Iran's foreign ministry and its ambassador to the UK, Seyyed Ali Mousavi, rejected the allegations as 'baseless' and an 'ugly conspiracy,' urging London to refrain from unfounded accusations. The episode has fueled wider debate in Britain over the scale of Iranian, Russian and Chinese security threats and whether the UK should publicly warn that Iran now poses a direct domestic risk.