UK-led 40-nation bloc threatens Iran with sanctions over Hormuz
Confidence: HIGH (88/100) | April 06, 2026 | United Kingdom
In one sentence: A UK-led coalition of 40 nations demanded Iran unconditionally reopen the Strait of Hormuz and threatened coordinated sanctions if the blockade continues.
Why it matters: The Strait of Hormuz carries roughly one-fifth of global oil exports; its blockade since February 28 has pushed crude prices above $110 per barrel and trapped thousands of ships and sailors. The 40-nation coalition represents the broadest coordinated non-US pressure campaign yet against Iran, with military planners from member states scheduled to meet the week of April 7 to plan post-war shipping security. The US absence signals a structural split in Western policy toward the Iran war, with Europe and allied nations now acting independently of Washington.
What Happened Today
- UK Foreign Secretary Yvette Cooper on April 2 chaired a virtual summit of over 40 countries — including France, Germany, Italy, Canada, Japan, the UAE, and Bahrain — and issued a four-point plan demanding Iran immediately and unconditionally reopen the Strait of Hormuz, with coordinated sanctions as a stated option if it does not, according to the UK Foreign, Commonwealth & Development Office Chair's Statement.
- The coalition's four-point plan commits members to: increase diplomatic pressure through the UN; explore coordinated economic measures including sanctions against Iran; work with the International Maritime Organisation to release ships and sailors trapped in the strait; and share operational information with the shipping industry, the FCDO Chair's Statement confirmed.
- Iranian attacks on commercial vessels have halted nearly all traffic through the strait since the US-Israeli war on Iran began February 28, 2026; Lloyd's List Intelligence recorded 23 direct attacks on commercial vessels and 11 crew deaths in the Gulf since that date, Al Jazeera reported citing the shipping data firm.
- British military planners are scheduled to meet with counterparts from coalition member nations the week of April 7 to develop plans for ensuring shipping security after the war ends, Al Jazeera reported citing UK officials; Prime Minister Keir Starmer stressed that Britain has no intention of entering the war.
- French President Emmanuel Macron said a military operation to force open the strait is 'unrealistic' and would expose ships to Iran's IRGC anti-ship missiles, drones, and ballistic missiles; Macron said reopening the strait requires direct negotiations with Iran following a potential ceasefire, Al Jazeera and the Anchorage Daily News reported.
Contested Claims
- UK FCDO Chair's Statement, Al Jazeera/AP/Reuters: The Strait of Hormuz is closed to all commercial shipping as a result of Iranian attacks and threats. Al Jazeera, citing Iran's stated position: Iran says 'non-hostile' ships may transit the strait; only vessels of enemy countries and their allies are blocked.
Unverified / Single Source
- (Unverified — single source | not independently corroborated) Trump's conditional ceasefire reprieve, which restricted US strikes on Iran, was originally set to expire on April 6. [United Against Nuclear Iran (UANI)]
- (Unverified — single source | not independently corroborated in fetched wire sources) Oil prices are hovering around $112 per barrel as a result of the Strait of Hormuz disruption. [International Business Times Singapore]
Numbers
| Metric | Today | War Total |
|---|---|---|
| Countries in UK-led coalition | 40+ | — |
| Iranian attacks on commercial vessels since Feb 28 | 23 attacks | — |
| Crew members killed in Gulf attacks since Feb 28 | 11 | — |
| Duration of Strait of Hormuz blockade (as of April 6) | — | ~37 days (since Feb 28, 2026) |
| Total attacks on commercial vessels in Gulf since war began | — | 23 |
| Total crew deaths in Gulf attacks since war began | — | 11 |
| Sources: Al Jazeera, FCDO, Lloyd's List Intelligence via Al Jazeera, UK FCDO Chair's Statement |
Frequently Asked Questions
Is the UK going to use military force to reopen the Strait of Hormuz? No. Prime Minister Keir Starmer has been explicit that the UK will not enter the war. French President Macron also called a military operation to force the strait open 'unrealistic' due to Iran's coastal anti-ship missiles, drones, and ballistic missiles. Military planners will only plan for post-war shipping security.
Why is the United States not part of the UK-led Hormuz coalition? President Trump stated that securing the Strait of Hormuz is not the United States' responsibility. Trump has also threatened to pull the US out of NATO and disparaged European allies for not backing the US-Israeli war on Iran, leaving the UK to assemble the coalition without Washington.
What sanctions could the coalition impose on Iran over the Strait of Hormuz? The April 2 coalition statement listed 'coordinated economic and political measures, such as sanctions' as a second-stage option if Iran keeps the strait closed. No specific sanctions package or timeline was announced; the coalition agreed to hold working-level expert meetings to determine details.
Background
The United States and Israel launched strikes on Iran on February 28, 2026, igniting a direct war. Iran retaliated by attacking commercial shipping and effectively blockading the Strait of Hormuz — a 21-mile-wide chokepoint through which roughly one-fifth of global oil exports normally flow. The UK-led coalition, convened on April 2, is the first major multilateral response, operating without US participation after Trump declared Hormuz security not an American responsibility.