The ghost of Iraq still stalks British foreign policy.
More than two decades after the UK joined the US-led invasion of Iraq in 2003 under Tony Blair, Labour leaders remain acutely aware of the political and moral cost of that decision. This week, Keir Starmer made it clear that the lesson still shapes government thinking as tensions escalate in the Middle East.
Speaking in the House of Commons following US-Israeli strikes on Iran, Starmer delivered what sounded like both a warning and a reassurance.
"This government remembers the mistakes of Iraq."
For Labour, Iraq is more than history — it is a permanent cautionary tale. The decision to back the invasion damaged trust in government, divided the party, and left a legacy that still influences parliamentary votes today. When Labour leader Ed Miliband refused to support military action in Syria in 2013, many observers saw it as a direct response to the political trauma of the Iraq War.
Starmer now finds himself navigating a similar dilemma.
The immediate crisis centres on escalating conflict between Israel, the United States and Iran. Britain initially refused to allow the US to use its military bases for strikes connected to regime change. The government's legal advice suggested such action could breach international law.
Starmer emphasised that principle clearly in the Commons:
"This government does not believe in regime change from the skies."
Yet foreign policy rarely allows for clean lines. After Iranian missile and drone attacks across the region raised fears for British citizens and military personnel, the UK position shifted. The government agreed to allow US forces to use British bases — but only for "specific and limited defensive purposes."
Officials argued the distinction was crucial. Intercepting missiles once launched is extremely difficult. The only effective way to stop the threat, they said, is to destroy the launch sites themselves — attacking what one official described as the "archer", rather than trying to hit the "arrow".
Even so, the government has been careful to stress what Britain will not do.
"We were not involved in the initial strikes on Iran, and we will not join offensive action now," Starmer told MPs.
Instead, the prime minister framed the decision in terms of protecting British lives and supporting allies acting in collective self-defence.
"In the face of Iran's barrage of missiles and drones, we will protect our people in the region and support the collective self-defence of our allies."
Behind the careful language lies a deeper anxiety inside government. One of the central lessons of the 2003 invasion of Iraq was that military power can remove a regime or cripple an enemy's military capability — but that is only the beginning of the problem.
The famous "shock and awe" phase of the Iraq War was swift. What followed was years of instability, insurgency and political chaos.
The concern now is that the same strategic vacuum could emerge again.
According to reports from inside Whitehall, some officials fear that Washington may not yet have a clear plan for what comes after the strikes on Iran. If that is true, the consequences could reverberate across the Middle East for years.
Starmer therefore finds himself walking a narrow path. Britain must maintain its alliance with the United States while avoiding being drawn into another open-ended conflict in the region.
For a Labour prime minister, the political stakes are especially high. The Iraq decision continues to haunt the party — a reminder that foreign policy choices made in moments of crisis can shape reputations for decades.
And that is why, when Starmer invokes Iraq in the Commons, it is not simply history he is talking about.
It is a warning.
