Iran has warned that Britain's RAF Fairford is a 'legitimate target' after the US used the base to launch a B1 bomber raid. The Islamic Revolutionary Guard Corps (IRGC) issued a statement threatening the 'British regime' with attacks if it continues to support America's war effort against Tehran.'The aggressive US military, which had been using cruise missiles from its ships in the Indian Ocean in its aggressions after the official resumption of the war, turned to using B1 aircraft flying from Fairford Air Base in England [...] as the missile reserves of the aforementioned ships ran out,' the statement said, according to the IRNA news agency.'As Foreign Ministry officials have also clarified, any base used to invade Iranian territory is our legitimate target,' it added.According to US news website Axios, the B1 - which can carry two-dozen 2,000lb bombs - took off from RAF Fairford in Gloucestershire on Tuesday. It marks the first such mission launched from the UK since Andy Burnham became prime minister.It was also the first time the US has carried out a B1 mission since fighting in Iran resumed nearly two weeks ago. Bloomberg reported earlier this week that Burnham, who took power on Monday following Sir Keir Starmer's formal resignation, had approved the use of UK military bases by the US. [File photo] Iran has warned that Britain's RAF Fairford is a 'legitimate target' after the US used the base to launch a B1 bomber raidIt is not currently known what the B1's target in Iran was, but Axios reports the long-range plane was used to hit IRGC assets.During Operation Epic Fury, B1s were used to hit missile bases, command centres, weapons storage facilities and air defence systems. Burnham had agreed to continue Starmer’s policy of allowing Washington to use the air base in Gloucestershire, as well as Diego Garcia airfield in the Chagos Islands for 'defensive strikes', according to Bloomberg. 'We warn the British monarchy, which is the main cause of the misfortunes of the people of our region and has a dark record of dividing Islamic countries [...] not to burden itself any further with this case,' the IRGC's statement said.The military group accused the UK of causing 'widespread massacres' in Islamic countries, 'imposing authoritarian governments', and organising 'the occupation of Palestine and the creation of the Israeli Nakba'.The Nakba, which means 'catastrophe' in Arabic, refers to the mass displacement of Palestinians during the 1948 Arab-Israeli war.The statement also condemned Britain for the 'greatest participation in the recent aggressions of the United States and the Zionist regime', referring to Israel. Ed Miliband, the foreign secretary, has long been against the government's policy of permitting the US to use British airbases during the war - prompting concern from the White House over his appointment. In February, he led opposition on the National Security Council to the use of UK bases for US bombers, triggering tension across the Atlantic. Donald Trump warned on Wednesday he would hit a bridge or power plant for every vessel Iran attacked in the Strait of Hormuz. It came as oil prices climbed back above $100 a barrel for the first time in two months - after Iran-backed Houthi militants struck two Saudi oil tankers as part of its naval blockade on Saudia Arabia.The attack risks creating a second chokepoint on the world's oil supplies amid Iran's near-closure of the Strait of Hormuz, through which around 20 per cent of the globe's oil and liquefied natural gas usually flows.The Yemeni group said it deployed missiles and drones to strike the vessels Encelia and Layla, accusing them of violating its embargo of the Red Sea. It followed the Houthis' announcement this week they were imposing a maritime blockade on Saudi Arabia - threatening to unravel a four-year ceasefire with the kingdom.The benchmark oil price surged sharply on Thursday, after reaching $95 a barrel the day before amid concerns that Yemen’s militia could strangle Saudi oil exports through the Red Sea.Trump unleashed a 12th consecutive night of strikes against Iran, threatening intense attacks on the nation's power plants and bridges, with the Islamic Republic also firing at targets in the Middle East. The Houthis control ⁠northern Yemen, including territory along the Bab el-Mandeb, a vital maritime trade route that links the Red Sea to the Gulf of Arden and the Indian Ocean.While the rebels have not formally announced the closure of the waterway, as some had feared might happen, the militia group’s threat to ships using Saudi ports has raised serious concerns over the safety of navigating a channel used by 7 per cent of global maritime traffic.