The UK and US are intensifying their efforts to counter Iran's influence, particularly concerning its alleged provision of ballistic missiles to Russia for use against Ukraine. British Foreign Secretary David Lammy and US Secretary of State Antony Blinken, set to visit Kyiv, stated they are united in condemning Iran's destabilizing activities. Blinken announced further sanctions on Iran, emphasizing its missile supply poses a threat to European security. Meanwhile, the UK Foreign Office has summoned Iran's envoy over the missile claims, which Iran has denied. Both officials acknowledged that the cooperation between Iran and Russia undermines global stability. This diplomatic mission marks the first joint visit of its kind in over a decade, underscoring the strengthened ties between the UK and US post-Brexit.