Royal Air Force Typhoon jets have conducted a mission with France's air force in a combined operation targeting an hidden munitions depot in Syria used by the Islamic State group (IS), according to the British defence ministry.
The site, located using intelligence, was thought to be containing munitions and bombs, the statement said, and was situated in hills just above the ancient city of Palmyra in central Syria.
"Our fighter planes utilized Paveway IV guided bombs to strike a series of approach shafts providing entry to the site... preliminary assessments suggest the target was engaged successfully," officials stated.
There was no indication of any civilian impact in the operation conducted Saturday night and each participating jet returned safely, the ministry further stated.
The Typhoon FGR4s were assisted by a Voyager aerial refuelling aircraft.
The Islamic State group - also known as ISIS - enforced jihadist rule over large swathes of Iraq and Syria prior to its 2019 collapse.
"This strike shows the UK's leading role, and commitment to operate in unison with our allies, to eradicate any revival of the terrorist group and their dangerous and violent ideologies in the Middle East," Britain's Defence Chief the Defence Secretary said.
British military aircraft have performed patrols over Syria to "deter any attempted resurgence" of the group after its military defeat at the battle of Baghuz in the year 2019, the MoD reported.
"I must thank all the members of British forces who took part in this strike for their professionalism and their bravery," he added. "They were among a great many British personnel stationed over Christmas and New Year. This action, to remove dangerous terrorists who pose a risk to our security, shows how UK forces are prepared to act, all year round, protecting the UK within its borders and strong abroad."
During December, the American forces carried out what it termed a "large-scale strike" targeting IS targets in Syria, following an attack claimed the lives of two American soldiers and a civilian linguist in Palmyra.
The United Nations says Islamic State still has an estimated 5,000 to 7,000 fighters in Syria and Iraq.