Royal Air Force Typhoon jets have operated alongside France's air force in a combined operation targeting an hidden munitions depot in Syrian territory employed by the Islamic State group (IS), per a report from the UK's MoD.
The site, identified by intelligence, was believed to be storing arms and explosives, the release indicated, and was positioned in mountainous terrain just to the north of Palmyra in the heart of Syria.
"The RAF jets employed laser-guided Paveway IV weapons to target a number of approach shafts down to the depot... initial indications are that the strike was effective," the MoD said.
There was no evidence of any harm to civilians in the strike late on Saturday and each participating jet returned safely, the MoD added.
The British jets were supported by a Voyager tanker plane.
Daesh - alternatively 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 shows our UK leadership, and determination to stand shoulder to shoulder with allied nations, to stamp out any re-emergence of the terrorist group and their harmful and extremist ideologies in the area," UK Defence Secretary John Healey remarked.
RAF aircraft have conducted patrols over Syria to "prevent any efforts to regroup" of Islamic State subsequent to its military defeat at the climactic battle in Baghuz in the year 2019, the MoD reported.
"I must thank all the members of the UK armed forces involved in this mission for their skill and their courage," he commented. "Including them were numerous British personnel on duty over Christmas and New Year. This action, to remove militants who endanger our safety, highlights how UK forces are prepared to act, all year round, keeping Britain secure domestically and strong abroad."
In December, the US military conducted what it called a "major assault" on Daesh sites in Syria, following an ambush resulted in the deaths of two American soldiers and a local interpreter in Palmyra.
The UN estimates Islamic State still has between 5,000 and 7,000 militants in both countries.