RAF Typhoon fighter aircraft have operated alongside French warplanes in a coordinated attack on an underground arms cache in Syria employed by the IS group, as stated by the British defence ministry.
The site, located using intelligence, was assessed as storing arms and explosives, the announcement noted, and was situated in mountainous terrain just above the historic site of Palmyra in the heart of Syria.
"Our fighter planes employed laser-guided Paveway IV weapons to strike a series of access tunnels leading to the facility... early reports indicate the strike was effective," the MoD said.
There was no sign of any civilian casualties in the attack on Saturday evening and each participating jet returned safely, the defence officials confirmed.
The Typhoon FGR4s were backed up by a Voyager aerial refuelling aircraft.
IS - referred to as ISIS - imposed extremist governance over large swathes of both Syria and Iraq prior to its 2019 collapse.
"This strike shows the UK's leading role, and determination to work closely with our allies, to eradicate any resurgence of IS and their violent and radical beliefs in the area," the British Defence Secretary John Healey said.
British military aircraft have carried out surveillance missions over Syria to "forestall any attempted comeback" of the group following its defeat at the Baghuz confrontation in 2019, the authorities noted.
"I want to thank all the members of the UK armed forces participating in this mission for their professionalism and their bravery," Healey said. "They were among a great many British personnel on duty over the festive period. This action, to eliminate militants who threaten our safety, highlights how UK forces are prepared to act, continuously, protecting the UK domestically and powerful internationally."
In December, the United States armed forces executed what it termed a "massive strike" targeting Islamic State objectives in the country, subsequent to an assault claimed the lives of two US troops and a civilian linguist in the Palmyra area.
The U.N. reports Daesh still maintains an estimated 5,000 to 7,000 fighters in Iraq and Syria.
