UK to Defend Hormuz Shipping Lanes But Not Join NATO Mission

Keir Starmer, the United Kingdom’s prime minister, spoke at a press conference on June 16 at 10 Downing Street about Washington’s request for British warships to join a naval deployment defending shipping through the Strait of Hormuz. He said Britain would take the necessary steps to defend itself and its allies but would not be drawn into a larger war, and he stressed that the move would not be a NATO mission.

Starmer said any deployment would rest on a solid legal footing and that deploying troops would require a clearly defined, thoroughly considered plan to keep service members safe. He acknowledged criticism from those who oppose attacks on Iran but argued that military action must be carefully justified and lawfully grounded.

The prime minister emphasized that the goal is to resolve the standoff through diplomacy and negotiations. He said Britain is working with European partners and other allies to devise a practical plan to restore freedom of navigation in the Hormuz Strait and to mitigate economic impacts as quickly as possible, while leaving room for prudent deliberation over time.

The remarks come after President Donald Trump on June 14 urged countries including South Korea, China, Japan, the United Kingdom and France to participate in defending Hormuz. On June 15, he warned that a lack of support or a negative response could "very negatively" affect NATO’s future, signaling high political stakes for alliance cohesion.

Starmer insisted that the issue should be addressed through diplomacy rather than an urgent military escalation, noting that any decision to send forces must be grounded in legal authority and thorough strategic planning.

Germany also signaled wariness about involvement. A spokesman for Chancellor Friedrich Merz said Germany would not participate in any form and would not support efforts to keep the Hormuz Strait open by force, adding that the conflict is not NATO’s war and has nothing to do with NATO.

Why this matters to the United States goes beyond Korea. The Hormuz Strait is a critical chokepoint for global energy shipments, and allied positions on whether to deploy military force in this region have implications for U.S. security policy, energy stability, and global markets. The episode tests NATO’s relevance and the cohesion of Western alliances at a time when Washington weighs potential responses to Iran and seeks to safeguard international trade routes.