Exercise Cambrian Patrol 2026 has drawn 140 patrols, the most since the British Army’s patrolling test began in 1959. Teams of eight set off across the Welsh mountains and cover up to 40 miles in roughly 48 hours, assessed on leadership, tactics and teamwork the whole way. The exercise is scheduled to run from Oct. 2 to Oct. 13, 2026.
The field is broad. Regular, Reserve and university units are joined by 35 international patrols and two combined British and international teams, and more than 350 personnel are supporting the event.
The figures come from the British Army’s own announcement of the 2026 exercise, published Oct. 1, 2026. It lists 75 Regular Army patrols, 15 Reserve teams and 13 from University Officer Training Corps units alongside the international entries, and calls the 2026 event “the biggest edition of the event since it began in 1959.” Per the Army, patrols “set off across the Welsh mountains, covering up to 40 miles over roughly 48 hours.”
Builth Wells to Sennybridge
The route has a fixed start and finish. UK Defence Journal, which reported the expansion on Oct. 5, 2026, said teams begin near Builth Wells after an equipment inspection at Beulah and finish at Sennybridge. Along the way they face casualty evacuation, intelligence gathering, artillery fire planning, vehicle recognition, simulated chemical, biological, radiological and nuclear (CBRN) incidents, reconnaissance, minefield crossings and attacks on enemy positions.
The exercise’s official site, which says the event is delivered by Headquarters 160th (Welsh) Brigade on behalf of Commander Field Army, gives the physical terms. It says patrols “cover approximately 60 kms” with an “average climb and descent” of over 1,000 meters, “carrying no more than 32 kgs per person.” The site dates the 2026 event “2–13 October 2026,” describes it as “the British Army’s principal All Arms Patrol Exercise,” and states that it is “not a competition.” Patrols are judged against the Army’s Battlecraft Syllabus and Individual Training Requirement, along with robustness and leadership.
Major Darren Pridmore, Officer Commanding Exercise Cambrian Patrol 2026, described the purpose in the Army’s announcement:
“This is all designed to test the skills that soldiers need to survive and fight on the modern battlefield.”
Drones and surveillance enter the scenario
The 2026 course has been reworked around recent operational lessons. Pridmore said in the Army release, “We’ve preserved the spirit of Cambrian Patrol while adapting it to reflect the realities of contemporary conflict.” He listed what changed: “From drones and persistent surveillance, to intelligence integration and CBRN readiness, this year’s exercise better reflects the challenges soldiers can expect to face on operations.”
He also tied the international turnout to how the British Army expects to fight. “The United Kingdom does not fight alone,” Pridmore said. “Future operations will be conducted alongside allies and partners, making interoperability and mutual understanding essential.”
From a Welsh weekend march to 140 patrols
The exercise started small. In an Army history published Oct. 3, 2024, for the event’s 65th year, the service said Cambrian Patrol began in 1959 “when a group of Welsh Territorial Army soldiers designed a weekend training event featuring long-distance marching over the Cambrian Mountains, culminating in a shooting match on the Sennybridge Training Area.” That same account said patrols are awarded “a gold, silver or bronze medal, or a completion coin” based on their performance, including task completion and the debrief.
The growth since then shows in the Army’s own year-by-year numbers. The 2024 article counted 113 patrols: 42 Regular, 18 Reserve, 15 University Officer Training Corps and 38 international, including two joint patrols. For 2025, the Army’s Oct. 3, 2025 preview listed 122 teams, among them 56 Regular, 12 Reserve, 18 university and 34 international teams plus two mixed British-international teams, with more than 1,000 soldiers taking part. The 2026 count of 140 patrols is the largest of the three, with the jump driven mainly by Regular Army entries, which rose from 42 in 2024 to 75.
The Army’s 2025 preview called Cambrian Patrol “NATO’s toughest patrolling test.” For 2026, patrols are scheduled to keep moving through the Brecon area in phases until the exercise closes on Oct. 13, 2026.
Top image: A patrol moves through woodland during Exercise Cambrian Patrol 2022 in Wales. Image Credit: Sgt Ben Beale RLC / British Army — OGL v3.0 / Wikimedia Commons
This article was produced with the assistance of AI and reviewed by Combat Rated editors prior to publication.