RAF Typhoon jets have joined forces with French warplanes in a combined operation against an underground arms cache in Syrian territory used by the IS group, per a report from the British defence ministry.
The facility, identified by surveillance, was assessed as containing munitions and bombs, the statement said, and was positioned in mountains just to the north of the ancient city of Palmyra in central Syria.
"The RAF jets employed precision-guided Paveway IV munitions to hit a series of access tunnels leading to the site... initial indications are that the strike was effective," the ministry announced.
There was no sign of any civilian impact in the attack on Saturday evening and every plane involved made a safe return, the MoD added.
The Typhoon FGR4s were backed up by a Voyager aerial refuelling aircraft.
The Islamic State group - alternatively referred to as the so-called Islamic State - imposed jihadist rule over significant areas in Syria and Iraq prior to its 2019 collapse.
"This strike demonstrates our UK leadership, and commitment to work closely with our partners, to stamp out any resurgence of the terrorist group and their dangerous and violent ideologies in the region," the British Defence Secretary the Defence Secretary remarked.
British military aircraft have conducted overwatch operations over Syria to "forestall any attempted comeback" of the group after its routing at the Baghuz confrontation in 2019, the MoD reported.
"I must thank the personnel of British forces participating in this operation for their expertise and their bravery," the Defence Secretary said. "Including them were thousands of UK service members stationed over the festive period. This action, to remove dangerous terrorists who endanger our safety, demonstrates how UK forces are always on standby, throughout the year, ensuring Britain's security within its borders and strong abroad."
In December, the American forces conducted what it called a "massive strike" targeting Daesh sites in Syria, subsequent to an assault claimed the lives of two American soldiers and a local interpreter in the Palmyra area.
The United Nations says IS still has between 5,000 and 7,000 militants in Iraq and Syria.
