British Air Force Typhoon jets have operated alongside French aircraft in a joint strike on an hidden munitions depot in Syrian territory used by the IS group, according to the UK's MoD.
The location, identified by surveillance, was believed to be containing munitions and bombs, the statement said, and was located in hills just north of the historic site of Palmyra in Syria's central region.
"Our fighter planes utilized Paveway IV guided bombs to target a several access tunnels leading to the depot... initial indications suggest the strike was effective," the ministry announced.
There was no evidence of any civilian casualties in the strike late on Saturday and each participating jet made a safe return, the defence officials confirmed.
The British jets were backed up by a Voyager tanker plane.
Daesh - referred to as Daesh - imposed extremist governance over parts of Syria and Iraq before its territorial defeat in 2019.
"This action underscores the UK's leading role, and commitment to operate in unison with allied nations, to eradicate any re-emergence of the terrorist group and their harmful and extremist ideologies in the Middle East," Britain's Defence Chief the Defence Secretary stated.
British military aircraft have carried out overwatch operations over Syria to "forestall any efforts to regroup" of IS after its military defeat at the climactic battle in Baghuz in 2019, the ministry said.
"I want to thank all the members of British forces who took part in this strike for their expertise and their courage," he commented. "They were among a great many UK service members stationed over the festive period. This mission, to eliminate dangerous terrorists who threaten our security, demonstrates how British military are ready to step up, continuously, ensuring Britain's security domestically and powerful internationally."
In December, the United States armed forces conducted what it described as a "major assault" against Daesh sites in the country, subsequent to an assault resulted in the deaths of two American soldiers and a civilian linguist in the Palmyra area.
The United Nations reports Islamic State still has an estimated 5,000 to 7,000 combatants in Syria and Iraq.
