RAF Typhoon jets have joined forces with France's air force in a combined operation targeting an underground arms cache in Syrian territory employed by the Daesh militant organization, according to the UK's MoD.
The location, pinpointed through reconnaissance, was assessed as housing weapons and explosive materials, the announcement noted, and was located in mountains just to the north of Palmyra in the heart of Syria.
"Our fighter planes employed precision-guided Paveway IV munitions to target a number of access tunnels providing entry to the depot... preliminary assessments indicate the target was engaged successfully," the MoD said.
There was no sign of any civilian casualties in the strike late on Saturday and each participating jet returned to base without incident, the defence officials confirmed.
The Typhoon FGR4s were assisted by a Voyager aerial refuelling aircraft.
The Islamic State group - referred to as the so-called Islamic State - established jihadist rule over large swathes of Iraq and Syria before its territorial defeat in 2019.
"This operation shows British leadership, and determination to operate in unison with our allies, to eliminate any re-emergence of the terrorist group and their harmful and extremist ideologies in the area," Britain's Defence Chief the Defence Secretary remarked.
UK warplanes have performed surveillance missions over Syria to "prevent any efforts to regroup" of Islamic State subsequent to its routing at the battle of Baghuz in the year 2019, the MoD reported.
"I extend gratitude to the personnel of British forces involved in this strike for their skill and their bravery," he added. "They were among a great many British troops stationed over the holidays. This action, to remove militants who endanger our security, highlights how British military are prepared to act, continuously, ensuring Britain's security domestically and powerful internationally."
In December, the American forces carried out what it called a "massive strike" targeting IS targets in Syria, after an assault killed two US servicemembers and a local interpreter in Palmyra.
The U.N. reports IS still boasts roughly 5-7 thousand fighters in both countries.
