Royal Air Force Typhoon jets have operated alongside French warplanes in a coordinated attack targeting an subterranean weapons facility in Syria employed by the Islamic State group (IS), according to the UK Ministry of Defence.
The site, located using intelligence, was believed to be containing munitions and bombs, the statement said, and was situated in mountainous terrain just north of the historic site of Palmyra in Syria's central region.
"Our fighter planes utilized laser-guided Paveway IV weapons to hit a number of approach shafts providing entry to the depot... preliminary assessments indicate the target was engaged successfully," the MoD said.
There was no evidence of any civilian casualties in the strike on Saturday evening and all the aircraft returned to base without incident, the ministry further stated.
The British jets were assisted by a Voyager tanker plane.
IS - referred to as ISIS - enforced jihadist rule over parts of both Syria and Iraq before its territorial defeat in 2019.
"This action shows the UK's leading role, and commitment to stand shoulder to shoulder with our allies, to stamp out any revival of the terrorist group and their violent and radical beliefs in the region," UK Defence Secretary the minister stated.
RAF aircraft have performed surveillance missions over Syria to "deter any attempted resurgence" of IS following its routing at the battle of Baghuz in 2019, the authorities noted.
"I extend gratitude to all the members of British forces participating in this strike for their skill and their valour," Healey commented. "They were among thousands of British troops on duty over the festive period. This mission, to remove dangerous terrorists who endanger our safety, demonstrates how British military are ready to step up, throughout the year, keeping Britain secure at home and powerful internationally."
During December, the American forces executed what it called a "major assault" targeting IS targets in Syria, after an ambush resulted in the deaths of two US servicemembers and a civilian linguist in Palmyra.
The United Nations says Daesh still boasts between 5,000 and 7,000 combatants in Syria and Iraq.
