British Air Force Typhoon jets have operated alongside French aircraft in a combined operation against an underground arms cache in Syrian territory operated by the IS group, as stated by the British defence ministry.
The location, located using intelligence, was believed to be containing munitions and bombs, the announcement noted, and was positioned in mountains just to the north of Palmyra in the heart of Syria.
"Our aircraft employed Paveway IV guided bombs to hit a several entry passages down to the facility... initial indications are that the objective was successfully hit," the ministry announced.
There was no indication of any civilian impact in the attack on Saturday evening and each participating jet returned to base without incident, the ministry further stated.
The Typhoon FGR4s were assisted by a Voyager aerial refuelling aircraft.
The Islamic State group - referred to as ISIS - established jihadist rule over large swathes of Syria and Iraq before its territorial defeat in 2019.
"This strike underscores the UK's leading role, and commitment to stand shoulder to shoulder with our allies, to stamp out any revival of Daesh and their harmful and extremist ideologies in the area," UK Defence Secretary John Healey said.
UK warplanes have carried out overwatch operations over Syria to "prevent any attempted resurgence" of IS following its defeat at the Baghuz confrontation in the year 2019, the ministry said.
"I must thank the personnel of our armed forces involved in this strike for their expertise and their courage," the Defence Secretary added. "Including them were numerous British personnel deployed over the festive period. This operation, to take out terrorist threats who pose a risk to our safety, highlights how our armed forces are prepared to act, continuously, ensuring Britain's security domestically and powerful internationally."
In December, the US military conducted what it called a "large-scale strike" on Daesh sites in Syria, following an assault resulted in the deaths of two American soldiers and a local interpreter in the Palmyra area.
The United Nations reports Daesh still has between 5,000 and 7,000 militants in both countries.
