The United Kingdom temporarily withdrew all diplomatic personnel from its embassy in Tehran on 22 July 2026, citing a deteriorating security environment. The Foreign, Commonwealth and Development Office (FCDO) stated that “due to the security situation, UK staff have been temporarily withdrawn from Iran” and that the mission “continues to operate remotely.” The FCDO advised against all travel to the country, warning that British and dual British-Iranian nationals face “significant risk of arrest, questioning or detention” and that consular assistance would be “extremely limited” or impossible in an emergency.

Viewed from Washington, the withdrawal followed a 12th night of US airstrikes on western Iran, which US Central Command said were designed to “further degrade Iran’s ability to threaten civilian mariners and commercial vessels.” President Donald Trump had earlier posted on Truth Social that “any time the Islamic Republic of Iran shoots at a ship in the Strait of Hormuz, whether it be by Missile, Rocket, Drone, or any other device or weapon, the United States will bomb and destroy ONE BRIDGE OR POWER PLANT,” including those near or inside Tehran. At a White House press conference with Lebanon’s president on 21 July, Trump also threatened to strike any site where Iran was “even thinking about nuclear weapons,” asserting that Iranian authorities were “trying, possibly, to rebuild” a nuclear facility.

Iranian Foreign Minister Seyed Abbas Araghchi responded on X that Iran would adopt an “eye for an eye” approach, while foreign ministry spokesman Ismail Baghaei called the US threats a violation of international law. Iranian state media reported missile strikes near Ahvaz, Ramshir and Andimeshk. In parallel, Iran launched a missile attack on a Jordanian city and triggered air-defence alerts in Bahrain and Saudi Arabia; Kuwait’s army said its air defences were “confronting attacks by hostile drones, following the sinful Iranian aggression.” Iran also targeted energy infrastructure and desalination plants in neighbouring Gulf states, actions that international law generally prohibits unless the facilities are used for military purposes.

The FCDO noted that since 8 July there had been “strikes and retaliatory attacks by Iran in a number of locations across the region against US military and civilian infrastructure,” and that the Iranian regime had “stated its intention to target locations associated with the US and Israel.” The withdrawal is not without precedent: London temporarily recalled diplomats in late February 2026, days before a US-Israeli military operation against Iran, and evacuated the families of embassy staff in June 2025 ahead of an Israeli missile strike on Tehran. The UK, alongside Germany and France, had previously pressed for a new nuclear agreement with Iran by mid-2025, threatening to restore UN Security Council sanctions; Iran in turn warned it could withdraw from the Treaty on the Non-Proliferation of Nuclear Weapons. British nationals in the region were advised to prepare for possible flight cancellations, periodic airspace closures and travel disruptions, with the FCDO describing the situation as “unpredictable” and warning of a risk of further escalation.