Monument record 0014010000 - GRIM'S DITCH, WOODLANDS PARK


Known length of Iron Age dyke system called Grim's Ditch extended through geophysical survey at Woodland's Park

Protected Status/Designation

  • Planning Notification Area: Earthworks of Prehistoric linear boundary of Grims Ditch
  • SHINE: Buried remains of Late Prehistoric major boundary known as Grim's Ditch, N of Road Farm


Type and Period (2)

  • BANK (EARTHWORK) (Early Iron Age to Late Iron Age - 700 BC? to 42 AD?)
  • DITCH (Early Iron Age to Late Iron Age - 700 BC? to 42 AD?)


Dimensions - Width 850cm, Height 120cm.
Plan Form - Curvilinear.
Grim's Ditch visible in plantation NE of Woodlands Park & runs with intervals for about 1km SW towards railway, then lost for about 3km until reappears in Oaken Grove, Great Hampden. Rampart at best section 120cm above ditch bottom (B1-2).
Dyke clear on hill & in good condition under trees. Scheduled: SAM No.35339. Scheduling revised February 2004 (B3).
Geophysical survey carried out by the Bartlett-Clark Consultancy in 1998 north of Road Farm (between SP88460303 and SP88570309) and west of Hunt's Green Farm (between SP89160364 and SP89200396) failed to produce conclusive evidence for the earthwork, although traces of the bank and ditch are thought to have been detected adjacent to a surviving length of the earthworks at SP89170366 (B17, B19).
Magnetometer survey along the projected line of Grim's Ditch to the southwest of Woodlands Park (at SP88720315 and SP88870327) failed to produce any evidence for the monument due to extensive subsurface debris. Resistivity survey of a further area to the west of Hunt's Green Farm (at SP89170367) was carried out to test previous survey results. Anomalies suggest that Grim's Ditch continues to the north, with a second roughly parallel bank and ditch on its east side. 2 profiles across earthwork recorded by Network Archaeology in February 1999 (B18).
Desk-based assessment of monument setting, including partial walk-over and drone surveys carried out in June 2018 for HS2 (B32).

Sources (8)

  • <1>SBC12646 Bibliographic reference: RCHM BUCKS 1 P176.
  • <2>SBC19 Map: 05 1960 6INCH MAP.
  • <3>SBC6652 Scheduling record: English Heritage. 2004. SCHEDULING LISTS OF INSPECTORATE OF ANCIENT MONUMENTS: SAM 35339.
  • <16>SBC19564 Unpublished document: Buckinghamshire County Museum Archaeological Service. 1997. An Archaeological and Management Survey of Grim's Ditch, Buckinghamshire.
  • <17>SBC19565 Unpublished document: Network Archaeology. 1998. Grim's Ditch Archaeological and Management Survey Phase II. pp3,8-9, Figs 6,15.
  • <18>XYSBC19566 Unpublished document: Network Archaeology. 1999. Grim's Ditch Archaeological and Management Survey Phase III. pp4-5,11,14-16, Appendix 2, Figs 6,23,24,35,36,45,46,47. [Mapped feature: #46107 ]
  • <19>SBC19568 Unpublished document: Alistair Bartlett. 1998. Bartlett A 1998 Grim's Ditch, Buckinghamshire: Report on Archaeogeophysical Survey. pp3-4, Plans 5-8.
  • <32>SBC25407 Unpublished document: Wardell Armstrong. 2018. A Record of the Setting of Grim's Ditch, Great Missenden Jones Hill Wood, Bucks - Site Code HS2 Phase 1 EWC Central Geophysical Survey Report for Jones Hill Wood.


Grid reference Centred SP 88688 03404 (1069m by 1110m) (2 map features)
Civil Parish THE LEE, Chiltern, Buckinghamshire
Civil Parish GREAT MISSENDEN, Chiltern, Buckinghamshire

Finds (0)

Related Monuments/Buildings (2)

Related Events/Activities (5)

  • Event - Survey: Desk-based assessment report including walk-over and drone survey (EBC18289)
  • Event - Survey: HS2 remote sensing survey - CH-004-009 (EBC17799)
  • Event - Survey: HS2 remote sensing survey - CH-004-010 (EBC17796)
  • Event - Survey: Magnetometry (and resistivity) survey (EBC16003)
  • Event - Survey: Magnetometry and resistivity surveys (EBC16000)

Record last edited

Jun 6 2022 2:58PM

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