RAF Typhoon jets have operated alongside France's air force in a combined operation on an subterranean weapons facility in Syria employed by the Islamic State group (IS), as stated by the British defence ministry.
The site, located using intelligence, was thought to be housing weapons and explosive materials, the statement said, and was situated in mountains just north of the ancient city of Palmyra in the heart of Syria.
"Our aircraft used Paveway IV guided bombs to target a several approach shafts leading to the site... early reports are that the objective was successfully hit," the ministry announced.
There was no indication of any civilian casualties in the attack late on Saturday and each participating jet returned to base without incident, the ministry further stated.
The Typhoon FGR4s were backed up by a Voyager tanker plane.
The Islamic State group - also known as Daesh - established militant control over large swathes of Iraq and Syria before its territorial defeat in 2019.
"This strike shows British leadership, and determination to stand shoulder to shoulder with allied nations, to eliminate any revival of IS and their violent and radical beliefs in the region," UK Defence Secretary the minister said.
UK warplanes have conducted patrols over Syria to "forestall any attempted comeback" of IS after its routing at the climactic battle in Baghuz in the year 2019, the ministry said.
"I extend gratitude to every member of our armed forces involved in this operation for their skill and their bravery," he said. "They were part of numerous British troops stationed over the festive period. This action, to remove terrorist threats who threaten our security, highlights how UK forces are always on standby, continuously, keeping Britain secure within its borders and powerful internationally."
During December, the United States armed forces executed what it termed a "massive strike" on Islamic State objectives in the country, after an assault resulted in the deaths of two US servicemembers and a civilian linguist in Palmyra.
The UN reports IS still maintains between 5,000 and 7,000 fighters in Iraq and Syria.
