On 16 April 2026, speaking at the UN General Assembly meeting on the use of the veto, UK Chargé d’Affaires James Kariuki restated London’s position after Russia and China blocked a Bahrain-led Security Council draft on the Strait of Hormuz. The UK line was simple but legally significant: interference with international shipping is not a narrow regional dispute, but a question of international peace, economic security and the continued force of navigational rights under the law of the sea. (gov.uk) The immediate backdrop was the 7 April 2026 Security Council vote. According to UN reporting, the draft secured 11 votes in favour, with Colombia and Pakistan abstaining, but it failed because China and Russia used their vetoes. The text would have encouraged defensive co-ordination to protect commercial navigation and demanded that Iran cease attacks on shipping and any attempt to impede transit through the strait. (ungeneva.org)
The UK statement is best read as a law-of-the-sea argument as much as a diplomatic complaint. Kariuki said Iran does not have the right unlawfully to impede transit passage through the Strait of Hormuz and called for full respect for navigational rights and freedoms under the UN Convention on the Law of the Sea and customary international law. (gov.uk) That position rests on settled treaty language. Under UNCLOS, ships and aircraft enjoy transit passage through straits used for international navigation, that passage must not be impeded, and bordering states must not hamper or suspend it. In practical terms, the UK’s rejection of tolls on vessels amounts to a refusal to recognise any pay-to-transit arrangement in a waterway treated in law as an international strait. (un.org)
The veto matters politically, but it does not erase the legal and diplomatic record the UK is building. On 11 March 2026, the Security Council had already adopted resolution 2817, which reaffirmed that navigational rights and freedoms for merchant and commercial vessels must be respected and condemned Iranian actions or threats aimed at closing or obstructing international navigation through the Strait of Hormuz. (documents.un.org) Russia and China justified their opposition on different grounds. UN reporting says Moscow argued that the 7 April draft treated Iranian actions as the sole source of regional tension, while Beijing said the text did not address what it described as the root causes of the conflict in a balanced way. For UK policymakers, that leaves a familiar Security Council problem: broad concern over a crisis, but no agreement on the language needed to compel a change of conduct at sea. (ungeneva.org)
The UK’s messaging is also deliberately economic. In the 16 April statement, Kariuki said attacks on shipping had blocked exports including fertiliser, liquefied natural gas and jet fuel, with humanitarian and economic effects far beyond the Gulf. The FCDO had already made the same case on 2 April, describing the strait as a critical corridor for oil, refined petroleum, LNG and fertilisers important to farming in Africa. (gov.uk) This is why London is treating maritime security here as a supply-chain and market-stability issue, not only a defence question. The official UK position is that disruption in the strait feeds directly into prices, availability and operating risk across energy, transport and food systems, which is also why ministers have pressed for the immediate and unconditional reopening of the waterway. (gov.uk)
The statement also points to the machinery now being assembled around the formal UN debate. The UK said it had already convened more than 40 countries in support of restoring navigational rights and that, on 17 April 2026, the UK and France were due to co-host a leader-level summit on a co-ordinated multinational plan to safeguard international shipping when the conflict ends. (gov.uk) That diplomacy is not limited to speeches. In the 2 April chair’s statement, the Foreign Secretary set out workstreams on pressure through the UN, possible co-ordinated economic and political measures if the strait remained closed, co-operation with the International Maritime Organisation to free trapped ships and sailors, and closer information-sharing with operators and industry bodies. That is the clearest sign that London sees the issue as part legal dispute, part sanctions-adjacent pressure campaign and part operational shipping contingency planning. (gov.uk)
The UK is pairing that harder maritime line with a diplomatic route back to de-escalation. Kariuki’s statement welcomed the ceasefire and talks between the United States and Iran, while saying the UK’s priority remained regional stability and a lasting end to the conflict. The operative message is that reopening the Strait of Hormuz is being treated not as an optional confidence-building step, but as a necessary part of any durable settlement. (gov.uk) For readers trying to decode the policy substance, this is less a report of one UN speech than a statement of the UK’s current theory of the case. London is arguing that the veto did not settle the matter, that existing international law already protects transit passage, and that the next phase will turn on coalition-building, market measures and maritime co-ordination rather than on a fresh Security Council consensus. (gov.uk)