Royal Air Force Typhoon jets have joined forces with France's air force in a coordinated attack on an hidden munitions depot in Syria used by the IS group, as stated by the British defence ministry.
The location, pinpointed through surveillance, was believed to be storing arms and explosives, the statement said, and was located in hills just above the ancient city of Palmyra in the heart of Syria.
"The RAF jets employed Paveway IV guided bombs to target a number of entry passages leading to the facility... initial indications are that the objective was successfully hit," officials stated.
There was no sign of any civilian casualties in the operation late on Saturday and each participating jet returned safely, the ministry further stated.
The British jets were backed up by a Voyager refuelling tanker.
The Islamic State group - referred to as the so-called Islamic State - imposed militant control over large swathes of Iraq and Syria until 2019.
"This strike demonstrates the UK's leading role, and commitment to work closely with our allies, to eradicate any re-emergence of IS and their harmful and extremist ideologies in the Middle East," UK Defence Secretary the Defence Secretary remarked.
RAF aircraft have conducted overwatch operations over Syria to "prevent any efforts to regroup" of Islamic State subsequent to its defeat at the Baghuz confrontation in the year 2019, the ministry said.
"I want to thank every member of the UK armed forces participating in this operation for their skill and their courage," he commented. "Including them were thousands of British personnel deployed over the holidays. This operation, to take out dangerous terrorists who threaten our security, shows how our armed forces are ready to step up, all year round, protecting the UK domestically and powerful internationally."
Last December, the American forces conducted what it described as a "large-scale strike" on Daesh sites in the country, following an attack killed two American soldiers and a local interpreter in the Palmyra area.
The U.N. says Islamic State still maintains an estimated 5,000 to 7,000 militants in Iraq and Syria.