The government has said the UK is “ready to defend itself” after Iran’s military warned that any bases being used by the US were “legitimate targets”.
The UK has allowed the US to launch “defensive” operations from British bases hosting American planes since the start of its war on Iran but has refused to help in offensive operations.
That policy has not been altered by the new prime minister, Andy Burnham, who was notified last week that a decision had been made to extend the agreement with the US.
Iran’s Islamic Revolutionary Guard Corps said on Thursday that “any base used for aggression against Iranian territory constitutes a legitimate target for our forces”.
In a statement published on the IRGC-linked Tasnim news agency, the group said American bombing missions had been launched from RAF Fairford in Gloucestershire two days earlier.
The statement came after the US carried out a 12th consecutive night of strikes against targets in Iran. The Ministry of Defence has not commented on whether Fairford was used by the US for operations against Iran this week.
The IRGC also accused the “British monarchy regime” of causing being the “primary cause of hardships in our region with a black record of partitioning Islamic nations, widespread massacres, imposing despotic regimes, and organising the occupation of Palestine”.
It warned the government “not to weigh down its record any further”.
A spokesperson for the British government said: “Our armed forces are ready to keep the United Kingdom safe from any kind of attacks, whether it’s on our soil or from abroad. The UK stands ready 24/7 to defend itself.
“This includes through operating a layered approach to air and missile defence, provided by Royal Navy, British Army and Royal Air Force assets equipped with a range of advanced capabilities, working closely with our Nato allies.
“We are committed to defending our people, our interests and our allies, acting in accordance with international law and not getting drawn into the wider conflict.”
On 1 March a drone struck the RAF base at Akrotiri in Cyprus, hitting a hangar, and prompting a partial evacuation of the facility. On 19 March, Iran fired two ballistic missiles at the UK’s Diego Garcia base in the Chagos Islands. One reportedly failed mid-flight, while the other was shot down by a US airship.
Iran has launched strikes against countries in the Gulf that house US military bases, including Bahrain, the United Arab Emirates and Kuwait, killing American service personnel in some of the attacks. Donald Trump said Iran would “pay a big price” for killing US troops.
On Thursday afternoon, the US president said he was considering ordering a “massive attack” on Iran. “I am close to making a decision,” he told Axios. “We’re all set for it.” He said he believed Iran’s leaders “want to negotiate”, but aren’t yet ready to make a deal.
In another sign of the conflict potentially escalating, Yemen’s Iran-backed Houthi rebels said they attacked two Saudi oil tankers in the Red Sea on Thursday, as oil topped $100 a barrel.