British Air Force Typhoon FGR4s have operated alongside French warplanes in a joint strike against an subterranean weapons facility in Syrian territory used by the Islamic State group (IS), according to the UK Ministry of Defence.
The location, identified by surveillance, was believed to be containing munitions and bombs, the announcement noted, and was situated in mountains just to the north of Palmyra in the heart of Syria.
"Our aircraft used precision-guided Paveway IV munitions to strike a number of entry passages leading to the facility... preliminary assessments indicate the strike was effective," the ministry announced.
There was no evidence of any civilian casualties in the operation conducted Saturday night and each participating jet returned safely, the MoD added.
The British jets were supported by a Voyager aerial refuelling aircraft.
Daesh - also known as Daesh - imposed extremist governance over significant areas in both Syria and Iraq until 2019.
"This action shows British leadership, and determination to stand shoulder to shoulder with our allies, to stamp out any resurgence of Daesh and their harmful and extremist ideologies in the Middle East," the British Defence Secretary the Defence Secretary said.
RAF aircraft have conducted surveillance missions over Syria to "deter any efforts to regroup" of Islamic State after its defeat at the climactic battle in Baghuz in 2019, the ministry said.
"I must thank every member of our armed forces involved in this mission for their skill and their bravery," Healey said. "They were among a great many UK service members deployed over the festive period. This mission, to remove terrorist threats who endanger our safety, highlights how our armed forces are ready to step up, all year round, ensuring Britain's security at home and powerful internationally."
During December, the US military executed what it described as a "major assault" on Islamic State objectives in Syria, after an ambush killed two American soldiers and a civilian linguist in Palmyra.
The U.N. estimates Islamic State still boasts between 5,000 and 7,000 fighters in both countries.
