British Air Force Typhoon jets have operated alongside French aircraft in a joint strike against an underground arms cache in Syria used by the IS group, per a report from the UK's MoD.
The site, located using surveillance, was assessed as storing arms and explosives, the release indicated, and was situated in mountains just to the north of the historic site of Palmyra in the heart of Syria.
"Our fighter planes used Paveway IV guided bombs to target a number of access tunnels down to the site... preliminary assessments are that the target was engaged successfully," officials stated.
There was no evidence of any harm to civilians in the strike on Saturday evening and every plane involved returned to base without incident, the MoD added.
The Typhoon fighters were assisted by a Voyager refuelling tanker.
The Islamic State group - referred to as ISIS - imposed jihadist rule over large swathes of Syria and Iraq prior to its 2019 collapse.
"This operation underscores British leadership, and determination to operate in unison with our allies, to eliminate any re-emergence of the terrorist group and their violent and radical beliefs in the Middle East," Britain's Defence Chief the Defence Secretary remarked.
UK warplanes have performed surveillance missions over Syrian airspace to "prevent any efforts to regroup" of the group subsequent to its routing at the Baghuz confrontation in 2019, the MoD reported.
"I extend gratitude to all the members of British forces participating in this strike for their skill and their valour," he added. "Including them were thousands of British personnel on duty over the festive period. This operation, to remove dangerous terrorists who endanger our safety, demonstrates how our armed forces are prepared to act, continuously, keeping Britain secure at home and powerful internationally."
In December, the American forces conducted what it described as a "massive strike" targeting Islamic State objectives in the country, subsequent to an assault killed two US troops and a civilian linguist in the Palmyra area.
The UN estimates IS still maintains an estimated 5,000 to 7,000 militants in both countries.