RAF Typhoon FGR4s have joined forces with France's air force in a coordinated attack against an underground arms cache in Syrian territory used by the IS group, as stated by the British defence ministry.
The site, identified by surveillance, was assessed as containing munitions and bombs, the statement said, and was positioned in hills just to the north of the ancient city of Palmyra in Syria's central region.
"Our fighter planes employed precision-guided Paveway IV munitions to hit a number of access tunnels providing entry to the facility... preliminary assessments are that the objective was successfully hit," officials stated.
There was no sign of any harm to civilians in the strike conducted Saturday night and every plane involved made a safe return, the MoD added.
The Typhoon fighters were backed up by a Voyager aerial refuelling aircraft.
Daesh - alternatively referred to as ISIS - imposed militant control over significant areas in Iraq and Syria before its territorial defeat in 2019.
"This operation shows our UK leadership, and determination to work closely with our allies, to eliminate any resurgence of IS and their violent and radical beliefs in the Middle East," the British Defence Secretary John Healey said.
RAF aircraft have performed patrols over Syrian airspace to "forestall any attempted comeback" of Islamic State following its military defeat at the climactic battle in Baghuz in 2019, the authorities noted.
"I want to thank the personnel of the UK armed forces participating in this strike for their professionalism and their valour," Healey added. "Including them were thousands of UK service members stationed over Christmas and New Year. This action, to take out dangerous terrorists who pose a risk to our security, highlights how our armed forces are always on standby, throughout the year, protecting the UK at home and strong abroad."
In December, the United States armed forces carried out what it called a "massive strike" against Daesh sites in the country, after an attack claimed the lives of two US servicemembers and a local interpreter in the Palmyra area.
The United Nations estimates Daesh still maintains between 5,000 and 7,000 fighters in Iraq and Syria.
