Royal Air Force Typhoon jets have conducted a mission with French aircraft in a coordinated attack on an hidden munitions depot in Syria operated by the IS group, as stated by the British defence ministry.
The location, identified by surveillance, was assessed as housing weapons and explosive materials, the release indicated, and was located in mountains just above Palmyra in Syria's central region.
"Our fighter planes employed laser-guided Paveway IV weapons to strike a number of entry passages down to the facility... early reports are that the objective was successfully hit," the ministry announced.
There was no evidence of any civilian impact in the attack on Saturday evening and all the aircraft made a safe return, the ministry further stated.
The Typhoon fighters were backed up by a Voyager refuelling tanker.
The Islamic State group - referred to as Daesh - established jihadist rule over significant areas in Iraq and Syria until 2019.
"This action demonstrates our UK leadership, and resolve to stand shoulder to shoulder with our partners, to stamp out any resurgence of IS and their violent and radical beliefs in the Middle East," the British Defence Secretary the minister remarked.
UK warplanes have carried out overwatch operations over Syrian airspace to "deter any attempted comeback" of Islamic State after its military defeat at the battle of Baghuz in 2019, the ministry said.
"I extend gratitude to every member of the UK armed forces participating in this mission for their professionalism and their courage," he added. "They were among a great many UK service members on duty over the holidays. This action, to eliminate militants who threaten our security, shows how UK forces are ready to step up, all year round, keeping Britain secure at home and powerful internationally."
Last December, the United States armed forces carried out what it called a "major assault" against Daesh sites in the country, after an attack resulted in the deaths of two US servicemembers and a civilian linguist in Palmyra.
The United Nations says Islamic State still has between 5,000 and 7,000 fighters in Syria and Iraq.