The UK Ministry of Defence announced on 13 May 2026 that British forces will commit Typhoon fighters, the Type 45 destroyer HMS Dragon, autonomous mine-clearance vessels and reconnaissance drones to the 40-nation Hormuz mission 1. Defence Secretary John Healey had co-chaired the coalition planning meeting with French counterpart Catherine Vautrin on 12 May. The announcement is the first multi-platform European force commitment for the strait since the Paris conference of 17 April.
The Strait of Hormuz is the 33-kilometre maritime chokepoint between Iran and Oman through which roughly a fifth of global oil and a fifth of global LNG transits daily. The 40-nation mission is the European-led successor framework: under UNCLOS (United Nations Convention on the Law of the Sea) transit-passage doctrine, freedom of navigation through international straits cannot be conditioned on tolls or permits. The UK and France used that doctrine to reject Trump's earlier Hormuz toll proposal. HMS Dragon's earlier first-party confirmation as the Royal Navy's forward platform is now operationalised at multi-platform level; Dragon's Sea Viper air-defence suite is the first European interception capability sized for IRGC drones and cruise missiles inside the strait.
In maritime law the first credible multilateral framework usually holds, and subsequent arrangements negotiate against it rather than displace it. The post-war Hormuz rulebook is being drafted in London and Paris while the Pentagon, despite running the only active blockade, sits on the briefing list rather than the drafting list. CENTCOM still runs the parallel US blockade, with 61 cumulative vessel redirections logged by 10 May ; both blockades operate in the same strait with incompatible written orders. John Healey set the mission's deployment trigger as "when conditions are met", meaning after a ceasefire, so the 13 May commitment buys legal and institutional architecture rather than live combat power.
P&I (Protection and Indemnity) clubs cannot underwrite Hormuz transits at non-war-zone rates until the 40-nation rules of engagement are published, leaving shipping stranded in the Persian Gulf and Brent above $107. The European text, once finalised, becomes the insurance industry's reference document for resumption.
