Royal Air Force Typhoon jets have conducted a mission with French aircraft in a coordinated attack on an subterranean weapons facility in Syria operated by the Daesh militant organization, per a report from the UK Ministry of Defence.
The site, pinpointed through reconnaissance, was believed to be housing weapons and explosive materials, the statement said, and was located in mountainous terrain just above the ancient city of Palmyra in Syria's central region.
"Our aircraft utilized precision-guided Paveway IV munitions to hit a several approach shafts providing entry to the site... early reports indicate the target was engaged successfully," the MoD said.
There was no evidence of any harm to civilians in the attack late on Saturday and all the aircraft returned safely, the MoD added.
The British jets were supported by a Voyager tanker plane.
IS - also known as Daesh - imposed jihadist rule over large swathes of Iraq and Syria until 2019.
"This action underscores our UK leadership, and determination to work closely with allied nations, to eradicate any resurgence of Daesh and their dangerous and violent ideologies in the Middle East," the British Defence Secretary the minister said.
RAF aircraft have conducted overwatch operations over Syria to "forestall any efforts to regroup" of Islamic State following its military defeat at the battle of Baghuz in the year 2019, the MoD reported.
"I extend gratitude to every member of British forces involved in this operation for their skill and their bravery," Healey said. "Including them were thousands of UK service members stationed over Christmas and New Year. This action, to eliminate terrorist threats who threaten our way of life, demonstrates how UK forces are prepared to act, continuously, ensuring Britain's security within its borders and influential overseas."
Last December, the American forces conducted what it described as a "massive strike" targeting Daesh sites in the country, after an ambush claimed the lives of two American soldiers and a local interpreter in the Palmyra area.
The U.N. reports Daesh still boasts between 5,000 and 7,000 fighters in Iraq and Syria.