British Air Force Typhoon jets have operated alongside France's air force in a combined operation on an hidden munitions depot in Syria used by the IS group, per a report from the British defence ministry.
The site, pinpointed through reconnaissance, was assessed as storing arms and explosives, the statement said, and was located in mountainous terrain just to the north of the ancient city of Palmyra in the heart of Syria.
"Our aircraft employed Paveway IV guided bombs to strike a series of entry passages leading to the facility... initial indications are that the strike was effective," the ministry announced.
There was no evidence of any harm to civilians in the attack on Saturday evening and all the aircraft returned to base without incident, the ministry further stated.
The British jets were backed up by a Voyager refuelling tanker.
The Islamic State group - also known as ISIS - enforced jihadist rule over parts of Syria and Iraq until 2019.
"This strike shows the UK's leading role, and determination to work closely with our allies, to stamp out any revival of Daesh and their dangerous and violent ideologies in the area," UK Defence Secretary the minister said.
British military aircraft have carried out surveillance missions over Syria to "prevent any attempted comeback" of the group after its defeat at the climactic battle in Baghuz in 2019, the ministry said.
"I want to thank every member of our armed forces participating in this mission for their expertise and their valour," he said. "They were part of numerous British personnel deployed over Christmas and New Year. This mission, to eliminate dangerous terrorists who endanger our safety, demonstrates how UK forces are prepared to act, throughout the year, protecting the UK domestically and influential overseas."
Last December, the United States armed forces carried out what it described as a "massive strike" against Daesh sites in the country, subsequent to an assault killed two US troops and a civilian linguist in the Palmyra area.
The U.N. reports IS still has an estimated 5,000 to 7,000 fighters in Iraq and Syria.
