RAF Typhoon FGR4s have operated alongside French warplanes in a coordinated attack against an underground arms cache in Syria used by the Daesh militant organization, as stated by the British defence ministry.
The facility, pinpointed through intelligence, was believed to be storing arms and explosives, the statement said, and was located in hills just to the north of the ancient city of Palmyra in central Syria.
"Our fighter planes used precision-guided Paveway IV munitions to target a number of access tunnels leading to the site... initial indications are that the target was engaged successfully," officials stated.
There was no indication of any civilian casualties in the attack conducted Saturday night and each participating jet returned to base without incident, the MoD added.
The British jets were supported by a Voyager refuelling tanker.
The Islamic State group - referred to as Daesh - established jihadist rule over large swathes of Syria and Iraq prior to its 2019 collapse.
"This strike shows our UK leadership, and determination to work closely with our allies, to eliminate any revival of the terrorist group and their violent and radical beliefs in the region," the British Defence Secretary the minister stated.
UK warplanes have carried out patrols over Syrian airspace to "deter any attempted comeback" of the group following its defeat at the battle of Baghuz in 2019, the MoD reported.
"I extend gratitude to all the members of the UK armed forces participating in this strike for their skill and their valour," he said. "They were among numerous UK service members on duty over the holidays. This mission, to eliminate militants who endanger our security, demonstrates how UK forces are prepared to act, all year round, keeping Britain secure at home and powerful internationally."
In December, the US military conducted what it termed a "major assault" against Islamic State objectives in the country, after an assault resulted in the deaths of two American soldiers and a civilian interpreter in the Palmyra area.
The U.N. says Islamic State still boasts between 5,000 and 7,000 combatants in both countries.
