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Pont Henllan Pillbox is a post-medieval defensive structure located in Wales and protected by Cadw under reference CM375. Built during the twentieth-century period of conflict, the pillbox exemplifies the small concrete gun emplacements constructed across Britain and Wales to provide rapid-response anti-tank and anti-personnel defence. The site sits upon Ashgill Rocks, undifferentiated strata of mudstone, siltstone and sandstone deposited during the Ordovician period, which would have provided stable ground for the structure's concrete foundations.
The pillbox's position reflects strategic thinking about territorial defence, with careful consideration given to sightlines and approach routes across the surrounding landscape. Its construction in reinforced concrete represents the rapid industrialised warfare response of the era, designed to be quickly erected and difficult to penetrate from conventional weaponry. The monument survives as a tangible reminder of civilian and military preparations during a period of national emergency.
Today Pont Henllan Pillbox remains an important record of twentieth-century Welsh and British defence infrastructure. Though the immediate threat that prompted its construction has long passed, the structure endures as evidence of the nation's wartime readiness and the engineering methods deployed to protect communities and strategic positions across the Welsh landscape.
Pont Henllan Pillbox is a scheduled monument protected by Cadw under reference CM375. View the official record →
Pont Henllan Pillbox is a post-medieval defensive structure located in Wales and protected by Cadw under reference CM375.
Pont Henllan Pillbox dates from the post medieval/modern period, and is classified as a pillbox. It is one of over 32,000 scheduled monuments protected across the UK.
Pont Henllan Pillbox is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is CM375.
Several scheduled monuments lie within 10 km, including Carreg Wen Standing Stone (6.7 km), Clawdd-Mawr (7.2 km), Nant-Gronw Round Barrows (7.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Pont Henllan Pillbox's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Pont Henllan Pillbox stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.