UK investigates leak from Iran strike security meeting

Britain’s foreign secretary David Lammy said a leak from a top-secret UK national security council meeting on US strikes against Iran was an “absolute travesty” and called for an investigation. The Guardian reports the leak concerned cabinet discussions over whether to allow the United States to use British bases in the region as Washington and Israel escalated attacks on Iran.

According to the report, the meeting last Friday was held under the Official Secrets Act framework that is meant to allow ministers to argue freely with intelligence and military chiefs present. The Spectator reported cabinet splits, naming Ed Miliband, Rachel Reeves, Yvette Cooper and Shabana Mahmood as opposing Keir Starmer’s move to permit US use of UK bases for strikes on Iranian targets. Lammy said he would not discuss the substance of the meeting, but argued that leaking its contents could put British personnel at risk.

Starmer, pressed on the story, did not directly confirm or deny the reported disagreement. Instead he offered a timeline: he said no US request arrived “in the specific terms” accepted by the UK until Saturday afternoon, meaning Friday’s session did not involve a concrete decision. He said the government worked through details with the US over the following day and granted permission on Sunday, after Iran launched retaliatory attacks across the Middle East.

The sequencing matters because it shows how war decisions can be built from logistics and basing permissions rather than formal declarations. A government can insist it is not joining “offensive action” while still providing the infrastructure that makes offensive action possible: runways, fuel, communications, stockpiles and legal cover. In the Guardian’s account, the UK framed its role as defensive and conditional, but the bases themselves became part of the conflict’s targeting logic once used.

Leaks, in that environment, are not just a breach of discipline; they are a way to shape the decision after the fact. Public reporting of internal opposition can harden positions, narrow room for reversal, and create reputational costs for ministers who might otherwise compromise. The same mechanism can work in the other direction, signalling resolve to allies and adversaries by making private deliberations look like settled policy.

In 2019, Theresa May sacked defence secretary Gavin Williamson after an inquiry concluded he had leaked details of a National Security Council meeting. This time, Lammy is asking for an investigation while the government continues to manage the practical question that triggered the dispute: which uses of British bases count as defence, and who gets to define the difference.

The permission Starmer described was granted on Sunday night. The leak was already in print.