RAF Typhoon fighter aircraft have conducted a mission with France's air force in a combined operation on an underground arms cache in Syria operated by the Daesh militant organization, as stated by the UK's MoD.
The location, located using intelligence, was assessed as housing weapons and explosive materials, the statement said, and was located in mountainous terrain just north of the ancient city of Palmyra in Syria's central region.
"Our aircraft used laser-guided Paveway IV weapons to hit a several access tunnels leading to the site... early reports indicate the target was engaged successfully," the MoD said.
There was no indication of any civilian casualties in the strike late on Saturday and each participating jet returned safely, the ministry further stated.
The Typhoon FGR4s were supported by a Voyager refuelling tanker.
Daesh - alternatively referred to as Daesh - imposed extremist governance over significant areas in Iraq and Syria before its territorial defeat in 2019.
"This operation shows British leadership, and determination to stand shoulder to shoulder with our partners, to stamp out any re-emergence of the terrorist group and their harmful and extremist ideologies in the area," the British Defence Secretary John Healey stated.
RAF aircraft have carried out surveillance missions over Syria to "prevent any efforts to regroup" of the group following its routing at the climactic battle in Baghuz in 2019, the ministry said.
"I must thank every member of British forces participating in this mission for their skill and their valour," the Defence Secretary added. "Including them were thousands of UK service members on duty over the festive period. This mission, to take out militants who threaten our way of life, highlights how our armed forces are prepared to act, throughout the year, ensuring Britain's security at home and influential overseas."
In December, the American forces executed what it described as a "large-scale strike" on IS targets in the country, after an ambush resulted in the deaths of two American soldiers and a civilian linguist in Palmyra.
The UN reports IS still boasts roughly 5-7 thousand militants in both countries.
