British Air Force Typhoon fighter aircraft have operated alongside French warplanes in a combined operation targeting an underground arms cache in Syria employed by the IS group, according to the UK Ministry of Defence.
The facility, located using reconnaissance, was assessed as containing munitions and bombs, the statement said, and was located in hills just north of the historic site of Palmyra in Syria's central region.
"Our aircraft employed precision-guided Paveway IV munitions to target a series of approach shafts leading to the facility... preliminary assessments suggest the strike was effective," the MoD said.
There was no evidence of any harm to civilians in the strike on Saturday evening and each participating jet made a safe return, the ministry further stated.
The Typhoon FGR4s were backed up by a Voyager aerial refuelling aircraft.
Daesh - alternatively referred to as ISIS - imposed jihadist rule over significant areas in Syria and Iraq prior to its 2019 collapse.
"This strike shows the UK's leading role, and determination to operate in unison with our partners, to eradicate any re-emergence of Daesh and their harmful and extremist ideologies in the Middle East," UK Defence Secretary the minister stated.
UK warplanes have conducted overwatch operations over Syria to "prevent any attempted comeback" of IS after its routing at the climactic battle in Baghuz in the year 2019, the ministry said.
"I want to thank the personnel of British forces involved in this strike for their skill and their bravery," Healey said. "They were among a great many British troops deployed over the festive period. This mission, to eliminate terrorist threats who endanger our way of life, highlights how our armed forces are ready to step up, continuously, keeping Britain secure within its borders and powerful internationally."
Last December, the US military carried out what it called a "major assault" against IS targets in Syria, subsequent to an attack resulted in the deaths of two US troops and a civilian linguist in the Palmyra area.
The U.N. reports IS still boasts an estimated 5,000 to 7,000 fighters in Syria and Iraq.
