RAF Typhoon FGR4s have joined forces with France's air force in a combined operation on an underground arms cache in Syrian territory operated by the IS group, according to the UK's MoD.
The facility, pinpointed through surveillance, was assessed as storing arms and explosives, the announcement noted, and was located in mountains just north of Palmyra in the heart of Syria.
"Our fighter planes used laser-guided Paveway IV weapons to target a number of access tunnels down to the facility... preliminary assessments suggest the strike was effective," officials stated.
There was no sign of any civilian casualties in the strike conducted Saturday night and every plane involved made a safe return, the MoD added.
The British jets were assisted by a Voyager tanker plane.
IS - also known as the so-called Islamic State - imposed extremist governance over parts of Syria and Iraq prior to its 2019 collapse.
"This action demonstrates the UK's leading role, and commitment to stand shoulder to shoulder with our partners, to stamp out any resurgence of the terrorist group and their dangerous and violent ideologies in the area," UK Defence Secretary the Defence Secretary remarked.
UK warplanes have performed overwatch operations over Syrian airspace to "forestall any efforts to regroup" of Islamic State after its routing at the Baghuz confrontation in the year 2019, the ministry said.
"I extend gratitude to the personnel of the UK armed forces who took part in this operation for their skill and their bravery," he said. "Including them were thousands of British troops stationed over Christmas and New Year. This mission, to remove militants who pose a risk to our way of life, highlights how British military are always on standby, all year round, ensuring Britain's security at home and powerful internationally."
During December, the United States armed forces executed what it called a "major assault" targeting Daesh sites in the country, after an ambush killed two American soldiers and a local interpreter in Palmyra.
The U.N. says IS still has between 5,000 and 7,000 combatants in both countries.
