Royal Air Force Typhoon fighter aircraft have joined forces with French warplanes in a combined operation targeting an underground arms cache in Syria employed by the IS group, as stated by the UK's MoD.
The location, located using surveillance, was thought to be containing munitions and bombs, the announcement noted, and was positioned in mountainous terrain just above the historic site of Palmyra in Syria's central region.
"Our aircraft used laser-guided Paveway IV weapons to hit a several access tunnels leading to the facility... initial indications are that the objective was successfully hit," the ministry announced.
There was no sign of any civilian impact in the operation conducted Saturday night and all the aircraft returned to base without incident, the MoD added.
The British jets were supported by a Voyager refuelling tanker.
The Islamic State group - referred to as Daesh - imposed jihadist rule over significant areas in both Syria and Iraq prior to its 2019 collapse.
"This strike shows the UK's leading role, and resolve to work closely with allied nations, to eliminate any revival of the terrorist group and their violent and radical beliefs in the region," the British Defence Secretary the Defence Secretary remarked.
UK warplanes have conducted patrols over Syrian airspace to "forestall any efforts to regroup" of Islamic State after its defeat at the Baghuz confrontation in 2019, the ministry said.
"I extend gratitude to every member of British forces who took part in this strike for their skill and their courage," the Defence Secretary commented. "They were among a great many British personnel stationed over Christmas and New Year. This action, to take out militants who pose a risk to our way of life, shows how our armed forces are ready to step up, all year round, protecting the UK domestically and powerful internationally."
Last December, the US military executed what it called a "major assault" on Daesh sites in Syria, subsequent to an ambush killed two American soldiers and a local interpreter in the Palmyra area.
The United Nations reports Daesh still maintains between 5,000 and 7,000 fighters in Iraq and Syria.