British Air Force Typhoon jets have operated alongside French warplanes in a coordinated attack targeting an subterranean weapons facility in Syria used by the IS group, as stated by the UK's MoD.
The facility, pinpointed through intelligence, was assessed as storing arms and explosives, the announcement noted, and was located in mountainous terrain just north of Palmyra in Syria's central region.
"Our fighter planes utilized precision-guided Paveway IV munitions to hit a number of entry passages leading to the site... early reports suggest the objective was successfully hit," the MoD said.
There was no sign of any civilian impact in the attack on Saturday evening and each participating jet returned to base without incident, the ministry further stated.
The Typhoon fighters were supported by a Voyager aerial refuelling aircraft.
The Islamic State group - referred to as Daesh - established extremist governance over parts of Iraq and Syria before its territorial defeat in 2019.
"This action shows the UK's leading role, and determination to stand shoulder to shoulder with allied nations, to eliminate any re-emergence of IS and their dangerous and violent ideologies in the area," Britain's Defence Chief the minister stated.
UK warplanes have carried out overwatch operations over Syria to "forestall any attempted resurgence" of Islamic State after its defeat at the Baghuz confrontation in 2019, the ministry said.
"I extend gratitude to all the members of British forces who took part in this operation for their expertise and their courage," he commented. "They were part of numerous British personnel on duty over the holidays. This mission, to eliminate terrorist threats who pose a risk to our way of life, shows how British military are ready to step up, throughout the year, keeping Britain secure at home and strong abroad."
In December, the American forces conducted what it termed a "massive strike" against IS targets in Syria, subsequent to an assault killed two US servicemembers and a local interpreter in the Palmyra area.
The United Nations says Islamic State still boasts an estimated 5,000 to 7,000 fighters in both countries.