Royal Air Force Typhoon jets have operated alongside French warplanes in a combined operation against an subterranean weapons facility in Syrian territory operated by the Daesh militant organization, according to the UK Ministry of Defence.
The site, pinpointed through reconnaissance, was thought to be containing munitions and bombs, the statement said, and was positioned in mountainous terrain just above Palmyra in the heart of Syria.
"Our fighter planes used Paveway IV guided bombs to target a series of access tunnels providing entry to the facility... early reports are that the strike was effective," the ministry announced.
There was no sign of any harm to civilians in the attack late on Saturday and all the aircraft returned to base without incident, the defence officials confirmed.
The British jets were assisted by a Voyager refuelling tanker.
Daesh - referred to as the so-called Islamic State - enforced jihadist rule over significant areas in both Syria and Iraq before its territorial defeat in 2019.
"This strike demonstrates our UK leadership, and determination to stand shoulder to shoulder with our partners, to stamp out any revival of the terrorist group and their violent and radical beliefs in the Middle East," Britain's Defence Chief the minister remarked.
RAF aircraft have carried out surveillance missions over Syrian airspace to "forestall any efforts to regroup" of Islamic State after its military defeat at the climactic battle in Baghuz in 2019, the MoD reported.
"I must thank the personnel of the UK armed forces involved in this mission for their skill and their bravery," the Defence Secretary added. "Including them were a great many British troops on duty over the holidays. This operation, to remove terrorist threats who threaten our way of life, shows how UK forces are always on standby, throughout the year, keeping Britain secure domestically and influential overseas."
Last December, the American forces carried out what it termed a "massive strike" against IS targets in Syria, subsequent to an attack claimed the lives of two US servicemembers and a civilian interpreter in the Palmyra area.
The UN estimates IS still maintains between 5,000 and 7,000 fighters in Syria and Iraq.
