British Air Force Typhoon fighter aircraft have operated alongside France's air force in a joint strike against an hidden munitions depot in Syria used by the IS group, according to the UK Ministry of Defence.
The location, located using reconnaissance, was thought to be containing munitions and bombs, the release indicated, and was positioned in mountains just to the north of the historic site of Palmyra in the heart of Syria.
"Our fighter planes used Paveway IV guided bombs to target a several entry passages down to the facility... preliminary assessments suggest the objective was successfully hit," the ministry announced.
There was no evidence of any harm to civilians in the attack conducted Saturday night and all the aircraft returned to base without incident, the MoD added.
The Typhoon FGR4s were supported by a Voyager refuelling tanker.
Daesh - referred to as the so-called Islamic State - enforced militant control over significant areas in both Syria and Iraq before its territorial defeat in 2019.
"This operation underscores British leadership, and resolve to work closely with our allies, to eliminate any re-emergence of Daesh and their dangerous and violent ideologies in the region," Britain's Defence Chief John Healey said.
British military aircraft have conducted overwatch operations over Syria to "forestall any efforts to regroup" of Islamic State following its routing at the climactic battle in Baghuz in 2019, the authorities noted.
"I want to thank the personnel of our armed forces who took part in this strike for their skill and their bravery," he added. "Including them were numerous British troops stationed over the festive period. This action, to take out militants who pose a risk to our security, highlights how British military are always on standby, all year round, ensuring Britain's security at home and powerful internationally."
Last December, the US military carried out what it described as a "massive strike" targeting Daesh sites in Syria, subsequent to an attack killed two US troops and a civilian linguist in Palmyra.
The United Nations reports IS still maintains roughly 5-7 thousand fighters in both countries.
