Addressing the House of Commons, Prime Minister Sir Keir Starmer said the UK would not participate in offensive action against Iran and “does not support regime change from the skies”. He confirmed that the United States may use British bases only for defensive missions aimed at Iranian missile infrastructure, distinguishing this from the initial US‑Israeli strikes in which the UK took no part. (ft.com)
Downing Street set out a legal basis of collective self‑defence for permitting access to British facilities, and said a summary of the government’s legal advice would be published. Starmer added that RAF aircraft are already flying defensive sorties in the region and have intercepted Iranian strikes coordinated with partners. (gov.uk)
Officials underlined that the authorisation applies to specific sites linked to active missile threats, and does not constitute UK involvement in broad offensive operations. The prime minister invoked lessons from Iraq in stressing that any UK step must be lawful, limited and tied to an achievable objective. (gov.uk)
The decision follows a weekend escalation that included a drone attack on RAF Akrotiri in Cyprus. The incident caused minor damage and no casualties, and occurred before the UK announced it would permit limited US use of British bases; force protection has since been reinforced. (time.com)
In setting out the context for the change, ministers referred to intensified Iranian retaliation across the region and to the killing of Iran’s Supreme Leader, Ayatollah Ali Khamenei, during the initial strikes by the US and Israel-an assessment reflected in the government’s public statement. (gov.uk)
Starmer’s office said the US request concerns RAF Fairford in Gloucestershire and the joint facility at Diego Garcia, with use confined to operations that disable launchers or storage sites being used to target regional partners. President Donald Trump publicly criticised the UK’s initial refusal to authorise the bases, before London shifted to a defensive‑only consent. (itv.com)
Parliamentary reaction has split along familiar lines. The Guardian reported Conservative figures urging firmer alignment with Washington, while the Liberal Democrats pressed for a Commons vote and publication of the full legal case before any sustained support via UK bases proceeds. Green party figures characterised US action as unlawful and warned against UK complicity. (theguardian.com)
Earlier reporting indicated the UK had resisted US requests to use Diego Garcia and RAF Fairford for the opening wave of strikes, citing legal concerns. That stance shifted after Iranian attacks were judged to endanger British people and allies, prompting a defensive‑only framework. (theguardian.com)
The prime minister said around 200,000 British nationals are currently in countries targeted by Iranian strikes, and urged those in the region to register their presence and follow Foreign Office advice. Officials continue contingency planning while large‑scale evacuations have not been announced. (theguardian.com)
Policy implications are immediate. The government has drawn a narrow legal line-supporting collective self‑defence through base access and air policing, while avoiding co‑belligerency. Editorial commentary has warned that this distinction could erode if missions broaden, reinforcing calls for transparent legal tests and parliamentary oversight should operations expand. (theguardian.com)