Politics

Iran targets Diego Garcia base

UK authorises expanded US strikes from British facilities, logistics hubs become the war’s price-setting choke points

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Diego Garcia, the site of the UK-US military base in the Chagos Islands. Photograph: NASA Archive/Alamy Diego Garcia, the site of the UK-US military base in the Chagos Islands. Photograph: NASA Archive/Alamy theguardian.com

Iran fired two intermediate-range ballistic missiles toward the UK–US base on Diego Garcia after Prime Minister Keir Starmer authorised the United States to carry out further strikes from British bases, according to The Guardian citing Iran’s Mehr news agency and reporting by the Wall Street Journal. Neither missile hit: one was intercepted by a US warship and the other failed in flight, the reports said. Britain’s Ministry of Defence condemned what it called “reckless” Iranian action while describing US use of UK bases as “specific and limited defensive operations”.

Diego Garcia sits roughly 3,800 kilometres from Iran, but its value is not proximity; it is throughput. The airfield can host long-range US bombers, and the island functions as a staging point for fuel, munitions, maintenance and command-and-control — the unglamorous plumbing that turns a political decision into a sustained campaign. When Iran shifts from striking front-line assets to threatening support nodes, the cost curve changes: the relevant bill is not only for bombs dropped, but for air defence, naval escorts, hardened infrastructure, redundancy across bases, and the war-risk insurance that makes supply flights and shipping schedules possible.

That bill does not land neatly in Washington. A base that is jointly used, politically authorised in London, and defended by US ships spreads both responsibility and cost while concentrating operational control. The Guardian reports that ministers had previously limited US use of UK bases to strikes framed as protecting British interests and Gulf allies, but expanded permission to include Iranian missile sites linked to the Strait of Hormuz. Tehran’s foreign minister Abbas Araghchi responded that Starmer was “putting British lives in danger” and said Iran would exercise its right of self-defence.

The domestic argument in Britain is already shifting from military necessity to constitutional procedure. Opposition figures cited by The Guardian — including Conservative leader Kemi Badenoch and the Liberal Democrats and Greens — say further permission should require a parliamentary vote, with Badenoch calling the move a major reversal and warning the UK was being “dragged into” the conflict. Starmer is expected to convene a Cobra meeting next week and, separately, discuss cost-of-living measures as energy disruption and shipping risk feed into prices.

The practical problem is that logistics hubs are easier to threaten than to replace. A contested choke point like Hormuz can be “reopened” in speeches, but traffic depends on whether insurers, shipowners and airlines can price the risk — and whether rear bases can operate without becoming liabilities. Diego Garcia’s remoteness is part of its design; the fact it is now within the envelope of attempted strikes is the point.

Two missiles that miss still force navies to stay on station, interceptors to be replenished, and political leaders to explain why a distant island has become a domestic issue.