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Grim's Ditch is a linear earthwork of probable Iron Age date running across the Middlesex landscape northeast from Oxhey Lane. This section of the monument extends for approximately 1500 yards and consists of a substantial bank and ditch formation characteristic of territorial or defensive boundaries constructed in antiquity. The earthwork represents a significant archaeological feature of the prehistoric period, though its precise function—whether primarily defensive, territorial, or ceremonial—remains a matter of scholarly interpretation. The monument survives as an important landscape feature demonstrating the scale of engineering undertaken by Iron Age communities in the Home Counties region.
Grim's Ditch: section extending 1500yds (1370m) NE from Oxhey Lane is a scheduled monument protected by Historic England under reference 1002044. View the official record →
Grim's Ditch is a linear earthwork of probable Iron Age date running across the Middlesex landscape northeast from Oxhey Lane. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1002044.
Grim's Ditch: section extending 1500yds (1370m) NE from Oxhey Lane is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1002044.
Several scheduled monuments lie within 10 km, including Grim's Ditch: four linear sections between Uxbridge Road and Oxhey Lane (0.9 km), Pinner deer park, Pinner Park Farm (1.9 km), Headstone Manor moated site (3 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Grim's Ditch: section extending 1500yds (1370m) NE from Oxhey Lane'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.
Grim's Ditch: section extending 1500yds (1370m) NE from Oxhey Lane stands on Thames Group, bedrock that formed in the Eocene. The rock here is clay, silt, sand and gravel.