Royal Air Force Typhoon fighter aircraft have operated alongside France's air force in a joint strike against an underground arms cache in Syria used by the IS group, per a report from the UK's MoD.
The site, located using surveillance, was assessed as housing weapons and explosive materials, the announcement noted, and was located in mountains just above Palmyra in the heart of Syria.
"Our aircraft utilized precision-guided Paveway IV munitions to target a several approach shafts leading to the site... initial indications indicate the target was engaged successfully," the ministry announced.
There was no indication of any civilian casualties in the attack conducted Saturday night and every plane involved made a safe return, the defence officials confirmed.
The Typhoon FGR4s were supported by a Voyager refuelling tanker.
Daesh - referred to as ISIS - enforced extremist governance over significant areas in Iraq and Syria until 2019.
"This action demonstrates British leadership, and commitment to work closely with our partners, to eradicate any re-emergence of Daesh and their dangerous and violent ideologies in the Middle East," the British Defence Secretary John Healey said.
UK warplanes have conducted overwatch operations over Syrian airspace to "forestall any efforts to regroup" of the group after its routing at the climactic battle in Baghuz in the year 2019, the MoD reported.
"I must thank the personnel of British forces participating in this operation for their professionalism and their courage," the Defence Secretary commented. "They were among a great many UK service members deployed over the holidays. This operation, to take out dangerous terrorists who threaten our safety, shows how UK forces are prepared to act, all year round, ensuring Britain's security at home and strong abroad."
During December, the US military executed what it called a "large-scale strike" against Daesh sites in Syria, following an assault resulted in the deaths of two US troops and a local interpreter in Palmyra.
The U.N. says IS still boasts roughly 5-7 thousand militants in Syria and Iraq.
