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Grim's Ditch is a linear earthwork consisting of four separate sections situated between Uxbridge Road and Oxhey Lane in Middlesex. The monument comprises a ditch with an associated bank, a morphology typical of territorial or defensive boundaries constructed during the Iron Age or Romano-British period. The discontinuous nature of the surviving sections reflects both the original pattern of construction and subsequent loss to agricultural and urban development. Its name, like many similar earthworks across southern England, derives from Anglo-Saxon folklore rather than documented historical record, though the ditch's primary function as a territorial marker or stock boundary remains consistent with analogous monuments of the later prehistoric and Roman periods.
Grim's Ditch: four linear sections between Uxbridge Road and Oxhey Lane is a scheduled monument protected by Historic England under reference 1003530. View the official record →
Grim's Ditch is a linear earthwork consisting of four separate sections situated between Uxbridge Road and Oxhey Lane in Middlesex. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1003530.
Grim's Ditch: four linear sections between Uxbridge Road and 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 1003530.
Several scheduled monuments lie within 10 km, including Pinner deer park, Pinner Park Farm (1.1 km), Grim's Ditch: section N of Blythwood House (2.3 km), Pinner Hill ice house, 70m north east of Pinner Hill Golf Clubhouse (2.4 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Grim's Ditch: four linear sections between Uxbridge Road and 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: four linear sections between Uxbridge Road and Oxhey Lane stands on Thames Group, bedrock that formed in the Eocene. The rock here is clay, silt, sand and gravel.