RAF Typhoon fighter aircraft have operated alongside French aircraft in a combined operation against an underground arms cache in Syrian territory used by the Daesh militant organization, according to the UK's MoD.
The facility, located using intelligence, was assessed as storing arms and explosives, the statement said, and was positioned in mountainous terrain just north of the historic site of Palmyra in Syria's central region.
"The RAF jets employed Paveway IV guided bombs to hit a number of approach shafts leading to the depot... initial indications are that the strike was effective," the ministry announced.
There was no indication of any civilian impact in the attack conducted Saturday night and each participating jet returned to base without incident, the MoD added.
The Typhoon FGR4s were supported by a Voyager tanker plane.
IS - referred to as Daesh - imposed jihadist rule over parts of Syria and Iraq prior to its 2019 collapse.
"This operation underscores British leadership, and determination to operate in unison with allied nations, to eliminate any resurgence of IS and their violent and radical beliefs in the Middle East," UK Defence Secretary John Healey said.
UK warplanes have performed overwatch operations over Syrian airspace to "forestall any attempted comeback" of the group following its routing at the battle of Baghuz in 2019, the MoD reported.
"I must thank every member of the UK armed forces involved in this mission for their professionalism and their bravery," Healey commented. "They were part of numerous British personnel on duty over the festive period. This operation, to take out militants who pose a risk to our safety, highlights how UK forces are always on standby, throughout the year, ensuring Britain's security domestically and influential overseas."
During December, the United States armed forces executed what it described as a "massive strike" targeting IS targets in the country, subsequent to an ambush killed two US troops and a local interpreter in Palmyra.
The U.N. reports Islamic State still maintains between 5,000 and 7,000 fighters in Iraq and Syria.
