Royal Air Force Typhoon fighter aircraft have operated alongside French warplanes in a combined operation on an underground arms cache in Syria operated by the Islamic State group (IS), according to the UK Ministry of Defence.
The location, identified by intelligence, was assessed as containing munitions and bombs, the release indicated, and was located in hills just to the north of the historic site of Palmyra in the heart of Syria.
"The RAF jets used precision-guided Paveway IV munitions to strike a number of entry passages providing entry to the facility... preliminary assessments indicate the target was engaged successfully," the MoD said.
There was no indication of any civilian casualties in the strike late on Saturday and every plane involved returned to base without incident, the MoD added.
The British jets were assisted by a Voyager refuelling tanker.
IS - referred to as the so-called Islamic State - imposed extremist governance over large swathes of Syria and Iraq before its territorial defeat in 2019.
"This action underscores our UK leadership, and resolve to work closely with allied nations, to stamp out any resurgence of the terrorist group and their harmful and extremist ideologies in the region," the British Defence Secretary the minister stated.
British military aircraft have carried out overwatch operations over Syria to "prevent any attempted comeback" of Islamic State following its routing at the Baghuz confrontation in the year 2019, the ministry said.
"I must thank the personnel of British forces participating in this operation for their professionalism and their bravery," Healey added. "They were part of a great many British troops stationed over Christmas and New Year. This action, to eliminate militants who pose a risk to our way of life, demonstrates how British military are prepared to act, throughout the year, ensuring Britain's security at home and powerful internationally."
In December, the US military conducted what it termed a "massive strike" on Daesh sites in Syria, subsequent to an attack resulted in the deaths of two American soldiers and a local interpreter in the Palmyra area.
The UN reports Islamic State still boasts roughly 5-7 thousand combatants in Syria and Iraq.
