RAF Typhoon jets have operated alongside French aircraft in a joint strike against an underground arms cache in Syria used by the IS group, as stated by the UK's MoD.
The location, identified by surveillance, was assessed as storing arms and explosives, the statement said, and was situated in mountainous terrain just above Palmyra in central Syria.
"Our fighter planes used laser-guided Paveway IV weapons to hit a number of access tunnels down to the site... preliminary assessments suggest the target was engaged successfully," officials stated.
There was no indication of any civilian impact in the operation conducted Saturday night and each participating jet returned to base without incident, the defence officials confirmed.
The Typhoon FGR4s were assisted by a Voyager tanker plane.
The Islamic State group - referred to as the so-called Islamic State - enforced militant control over significant areas in Syria and Iraq until 2019.
"This action shows our UK leadership, and resolve to work closely with our partners, to eliminate any revival of the terrorist group and their harmful and extremist ideologies in the region," the British Defence Secretary the minister stated.
RAF aircraft have conducted patrols over Syrian airspace to "deter any efforts to regroup" of IS subsequent to its military defeat at the battle of Baghuz in 2019, the MoD reported.
"I must thank every member of British forces who took part in this operation for their professionalism and their bravery," he commented. "Including them were thousands of UK service members stationed over the holidays. This action, to remove militants who pose a risk to our safety, shows how British military are ready to step up, continuously, ensuring Britain's security at home and powerful internationally."
During December, the American forces carried out what it termed a "major assault" against IS targets in Syria, after an ambush claimed the lives of two US troops and a civilian linguist in the Palmyra area.
The U.N. estimates IS still has between 5,000 and 7,000 militants in both countries.
