Royal Air Force Typhoon jets have operated alongside French warplanes in a combined operation on an underground arms cache in Syria operated by the Islamic State group (IS), as stated by the British defence ministry.
The location, located using surveillance, was assessed as containing munitions and bombs, the statement said, and was positioned in mountains just above the ancient city of Palmyra in Syria's central region.
"Our fighter planes used Paveway IV guided bombs to hit a series of approach shafts providing entry to the depot... early reports are that the strike was effective," the MoD said.
There was no evidence of any harm to civilians in the operation late on Saturday and all the aircraft returned to base without incident, the ministry further stated.
The Typhoon fighters were supported by a Voyager refuelling tanker.
The Islamic State group - alternatively referred to as the so-called Islamic State - established jihadist rule over significant areas in Syria and Iraq until 2019.
"This action underscores the UK's leading role, and commitment to operate in unison with our partners, to stamp out any re-emergence of Daesh and their violent and radical beliefs in the area," the British Defence Secretary the Defence Secretary stated.
UK warplanes have performed overwatch operations over Syria to "prevent any attempted resurgence" of the group following its defeat at the Baghuz confrontation in 2019, the ministry said.
"I must thank all the members of the UK armed forces participating in this mission for their expertise and their valour," the Defence Secretary added. "Including them were numerous UK service members deployed over the festive period. This action, to take out terrorist threats who pose a risk to our way of life, shows how UK forces are always on standby, throughout the year, ensuring Britain's security within its borders and powerful internationally."
In December, the United States armed forces carried out what it called a "large-scale strike" on Islamic State objectives in the country, following an assault resulted in the deaths of two American soldiers and a civilian interpreter in the Palmyra area.
The UN reports Islamic State still maintains roughly 5-7 thousand fighters in Iraq and Syria.
