Royal Air Force Typhoon fighter aircraft have operated alongside French warplanes in a joint strike on an hidden munitions depot in Syria used by the IS group, per a report from the British defence ministry.
The site, identified by surveillance, was thought to be containing munitions and bombs, the statement said, and was located in mountainous terrain just north of Palmyra in Syria's central region.
"Our aircraft utilized Paveway IV guided bombs to hit a number of entry passages leading to the facility... preliminary assessments are that the strike was effective," the ministry announced.
There was no sign of any civilian casualties in the operation on Saturday evening and each participating jet returned to base without incident, the defence officials confirmed.
The British jets were backed up by a Voyager aerial refuelling aircraft.
Daesh - referred to as Daesh - imposed extremist governance over significant areas in Syria and Iraq until 2019.
"This strike underscores the UK's leading role, and commitment to work closely with our allies, to eliminate any resurgence of the terrorist group and their dangerous and violent ideologies in the Middle East," Britain's Defence Chief the minister remarked.
UK warplanes have conducted overwatch operations over Syria to "forestall any attempted comeback" of the group subsequent to its military defeat at the Baghuz confrontation in 2019, the ministry said.
"I want to thank the personnel of British forces involved in this strike for their expertise and their courage," the Defence Secretary added. "They were among thousands of British personnel stationed over the holidays. This mission, to remove militants who endanger our safety, shows how British military are prepared to act, throughout the year, ensuring Britain's security within its borders and influential overseas."
Last December, the US military executed what it termed a "large-scale strike" targeting Daesh sites in Syria, following an assault claimed the lives of two US servicemembers and a local interpreter in the Palmyra area.
The United Nations says Daesh still has roughly 5-7 thousand militants in Iraq and Syria.
