Pentyrch Incident: Wales’ Cosmic Close Encounter

Header Image

A Night of Cosmic Chaos


In the early hours of February 26, 2016, the quiet village of Pentyrch, Wales, erupted into a scene straight out of a sci-fi epic. Multiple witnesses reported a massive pyramid-shaped UFO with red and green lights hovering over fields near Garth Mountain. Military planes and helicopters swarmed the area, accompanied by loud explosions, shaking buildings, and damaged trees. The Ministry of Defence claimed it was a routine exercise called Chameleon, but locals insist it was something extraterrestrial. Social media in 2025 keeps the mystery alive, dubbing it Britain’s Roswell. Ready to unravel this cosmic puzzle?

Witness Caz Clarke and investigator Gari Jones have led the charge, documenting the event in a book and presentations. Their accounts, backed by physical evidence like electromagnetic residue, paint a vivid picture of a night that defies explanation. Let’s dive into the timeline to map out this otherworldly tale.

Timeline: The Pentyrch UFO Saga


  • February 23-25, 2016: Witnesses report unusual military aircraft circling Pentyrch for 72 hours, tracked on radar, hinting at something big brewing.
  • February 26, 2016, 2 AM: Caz Clarke and neighbor Dave spot a massive pyramid-shaped UFO with red and green lights over fields near Garth Mountain. It performs pendulum-like movements.
  • February 26, 2016, 2:30 AM: The UFO descends, ejecting red and green orbs. Its lower lights turn bright orange, releasing thick, fire-colored lightning fingers to the ground, illuminating its pyramid shape.
  • February 26, 2016, 3 AM: Military planes and helicopters swarm the area. Two loud explosions rock Pentyrch, one recorded on a seismograph 40 miles away. Buildings shake, and the M4 closes.
  • February 26, 2016, Morning: Witnesses report damaged trees in Smilog woods, mystery figures in white overalls, and an Apache helicopter with a burning cockpit. A news article calls it a military drill.
  • 2017: Caz Clarke and Gari Jones begin investigating, finding electromagnetic residue three times normal levels at the site. Clarke passes three lie detector tests.
  • 2018: Swansea UFO Network visits Pentyrch, confirming high electromagnetic residue and damaged trees, suggesting unnatural activity.
  • 2021: Clarke and Jones publish The Pentyrch Incident, calling it the greatest UFO cover-up of modern times, citing FOI responses and witness accounts.
  • 2022-2024: FOI requests to the Ministry of Defence and Welsh Government yield vague responses, citing no flare use and invoking Section 26 exemptions for national security.
  • 2025: Social media buzzes with renewed interest, tying the incident to Roswell and Montauk, as UFO discussions heat up globally.

The Pyramid Craft: A Cosmic Visitor?


Picture a massive, pyramid-shaped craft, thousands of feet up, glowing with red and green lights over Pentyrch’s fields. Witness Caz Clarke described it as a towering presence, moving like a pendulum before descending near Garth Mountain. As it neared the ground, its lower lights blazed orange, revealing its 3D pyramid shape and shooting thick, fire-colored lightning fingers downward. Smaller black, red, and green orbs danced around it, merging into a pulsating pattern. Witness Mike Henbury saw it light up fully, 10 to 12 feet above the ground, before it vanished.

Social media in 2025 debates whether this was alien tech or a secret military craft, with users noting its delta-like shape doesn’t match typical planes. The craft’s eerie glow keeps the mystery alive.

Military Frenzy: Chameleon or Cover-Up?


The night of February 26, 2016, saw intense military activity. Witnesses reported planes and helicopters chasing the UFO, with some claiming an Apache helicopter landed with its cockpit ablaze. Two explosions shook Pentyrch, one so powerful it registered on a seismograph 40 miles away. The M4 closed, and buildings trembled. The Ministry of Defence called it Exercise Chameleon, a routine drill, but FOI responses revealed no flares were used, contradicting typical training explanations. Clarke claimed she was scanned by the UFO and pressured to stay silent for 18 months.

Social media in 2025 questions the military’s story, pointing to the heavy presence over a civilian area as evidence of a cover-up, akin to Roswell.

Physical Evidence: Trees, Residue, and Wreckage


The Pentyrch Incident left tangible traces. Smilog woods showed damaged trees, with some snapped or scorched. A field near the village hall had a bald patch where grass wouldn’t grow, only weeds. Swansea UFO Network’s 2018 visit, guided by Clarke, found electromagnetic residue three times normal levels at the site, suggesting something unnatural. Witnesses reported mystery figures in white overalls cleaning up debris, hinting at a rushed cover-up. Clarke’s book notes a weird snowfall, adding to the eerie aftermath.

In 2025, social media users share photos of the bald patch and damaged trees, calling them proof of extraterrestrial activity. The evidence fuels cosmic speculation.

Caz Clarke and Gari Jones: The Truth Seekers


Caz Clarke, a primary witness, and Gari Jones, an independent UFO researcher, have been the driving force behind the Pentyrch story. Clarke’s vivid account, backed by three passed lie detector tests, describes being scanned by the UFO and witnessing its descent. Jones, investigating since 2017, used FOI requests to challenge the Ministry of Defence’s vague responses. Their book, The Pentyrch Incident, compiles witness accounts and evidence, labeling it a modern UFO cover-up. Their work with Swansea UFO Network keeps the case alive.

Social media in 2025 hails Clarke as a brave whistleblower, with users sharing her podcast appearances and book excerpts, comparing her to Roswell witnesses.

The Cover-Up: Exercise Chameleon or Something More?


The Ministry of Defence’s claim of a routine Exercise Chameleon doesn’t add up for many. FOI responses from 2022-2024 cite Section 26 exemptions for national security, withholding details. The Welsh Government claimed no information, despite the M4 closure and seismograph data. Witnesses reported military aircraft circling for 72 hours prior, unusual for a drill. The lack of flare use and the presence of mystery figures in white suggest a cleanup operation. Social media in 2025 speculates the military shot down a UFO, hiding alien tech.

The cover-up narrative, echoed in Clarke’s book and a 2022 Sky History show, keeps Pentyrch in the cosmic spotlight, rivaling historic UFO cases.

A Cosmic Call to Pentyrch


The Pentyrch Incident, with its pyramid UFO, military chase, and physical evidence, feels like an X-Files episode come to life. On that cold February night in 2016, something extraordinary happened near Garth Mountain. Social media in 2025 buzzes with thousands of posts tying it to Roswell and Montauk, fueled by Clarke’s testimony and Jones’ investigations. Was it an alien craft or a secret military test? As one user put it, the truth is out there, glowing in that Welsh field.

So, what do you think? Is Pentyrch Britain’s Roswell or a misunderstood drill?

THE THiNG STANDING BEHiND YOU SAID YOU WOULD ENJOY THE STORIES BELOW ツ