British Air Force Typhoon FGR4s have joined forces with French aircraft in a coordinated attack against an hidden munitions depot in Syria operated by the IS group, as stated by the UK's MoD.
The facility, located using reconnaissance, was assessed as housing weapons and explosive materials, the announcement noted, and was positioned in mountainous terrain just north of Palmyra in the heart of Syria.
"The RAF jets used Paveway IV guided bombs to strike a several access tunnels down to the facility... preliminary assessments suggest the strike was effective," the ministry announced.
There was no sign of any harm to civilians in the operation conducted Saturday night and every plane involved returned to base without incident, the MoD added.
The Typhoon fighters were supported by a Voyager aerial refuelling aircraft.
The Islamic State group - referred to as ISIS - enforced militant control over significant areas in Syria and Iraq before its territorial defeat in 2019.
"This strike shows British leadership, and determination to work closely with our allies, to stamp out any revival of Daesh and their harmful and extremist ideologies in the area," Britain's Defence Chief John Healey remarked.
UK warplanes have performed patrols over Syrian airspace to "prevent any attempted comeback" of IS after its military defeat at the climactic battle in Baghuz in 2019, the MoD reported.
"I want to thank every member of the UK armed forces who took part in this operation for their professionalism and their courage," he added. "They were part of numerous British troops on duty over the holidays. This mission, to take out militants who endanger our security, shows how UK forces are ready to step up, continuously, protecting the UK domestically and strong abroad."
In December, the American forces carried out what it termed a "massive strike" on Islamic State objectives in Syria, following an attack resulted in the deaths of two US servicemembers and a civilian linguist in Palmyra.
The United Nations reports Islamic State still boasts an estimated 5,000 to 7,000 combatants in Iraq and Syria.