RAF Typhoon FGR4s have joined forces with French warplanes in a joint strike against an underground arms cache in Syrian territory operated by the IS group, according to the UK Ministry of Defence.
The facility, pinpointed through reconnaissance, was believed to be housing weapons and explosive materials, the statement said, and was located in hills just to the north of the historic site of Palmyra in central Syria.
"Our fighter planes employed laser-guided Paveway IV weapons to hit a series of approach shafts leading to the site... preliminary assessments indicate the strike was effective," the MoD said.
There was no indication of any civilian impact in the attack on Saturday evening and every plane involved returned safely, the MoD added.
The Typhoon FGR4s were backed up by a Voyager refuelling tanker.
Daesh - alternatively referred to as ISIS - enforced jihadist rule over significant areas in both Syria and Iraq before its territorial defeat in 2019.
"This strike demonstrates our UK leadership, and commitment to stand shoulder to shoulder with allied nations, to eradicate any revival of IS and their harmful and extremist ideologies in the Middle East," Britain's Defence Chief the minister said.
RAF aircraft have carried out surveillance missions over Syrian airspace to "prevent any attempted comeback" of Islamic State subsequent to its military defeat at the climactic battle in Baghuz in 2019, the ministry said.
"I extend gratitude to all the members of British forces who took part in this strike for their expertise and their courage," Healey said. "They were part of thousands of British personnel stationed over Christmas and New Year. This action, to eliminate militants who threaten our way of life, highlights how our armed forces are always on standby, throughout the year, ensuring Britain's security at home and influential overseas."
Last December, the American forces executed what it described as a "large-scale strike" targeting Daesh sites in Syria, subsequent to an ambush resulted in the deaths of two US troops and a local interpreter in Palmyra.
The U.N. reports Islamic State still maintains between 5,000 and 7,000 militants in both countries.
