Canterbury’s Forgotten Iron Age Fort, Camp Cunliffe: Knockhimdown Hill, Canterbury, Kent

Knockhimdown Hill is located in the Blean, between East Kent’s northern coast and Canterbury (Fig 1). Access is via public footpath on Thornden Road. It sits just under five miles due North of Canterbury and six miles northeast of Bigbury Camp. Site coordinates are 51.337692, 1.092824.

During satellite imagery analysis of terrain immediately north of Canterbury (Fig 2), in Thornden Wood and Knockhimdown Hill, a feature suggestive of a Neolithic ring ditch or enclosed settlement was apparent. Of particular interest was the fact that the Radfall led directly to the site.

[fg]jpg|Fig 1 - Map Showing Site Location. Google Earth (2026).|Image[/fg]

[fg]jpg|Fig 2 - Possible Ring Ditch. Google Earth (2009) V.10.104.67.2. Available from: https://earth.google.com/web/ [Accessed 2026].|Image[/fg]

[fg]jpg|Fig 3 - Possible Neolithic Ditch Early LiDAR image. Archi UK (2025).|Image[/fg]

[pg51]The Radfall represents a historically significant ancient droveway, utilised for the transportation of livestock and swine from pastures on the Blean to the city of Canterbury, likely primarily for market purposes.[fn1] This part of Kent, now an outstanding ancient woodland, is carefully managed by Kent Wildlife Trust.

Initial LiDAR images (Fig 3) revealed a potential Neolithic ring ditch, prompting an on-site investigation. Observations during the visit revealed a level of complexity that exceeded preliminary expectations. Ascending the hill toward the summit, notable remains of defensive earthworks were apparent (Fig 4), likely two ramparts and associated ditches. At the apex, a panoramic vista of Herne Bay and Whitstable unfolds, extending towards the North Sea.

The summit, now covered in woodland, revealed several significant archaeological features, including segments of the main central bank and its accompanying ditch. There are earthwork remains throughout the woodland. Regrettably, the necessary permissions from the landowners (Kent Wildlife Trust and Frog Island Farm) for archaeological investigations have not been granted. Consequently, cleaning features in detail to acquire precise measurements was not possible. Nevertheless, observations indicate that the central ditch currently measures approximately 4.75 meters wide and 1.5 meters deep (Fig 5). Additionally, where the inner bank is preserved, it is estimated to reach approximately 2 meters in height.

Initial investigations turned to the origin of the name Radfall. Parish and Shaw[fn2] initially believed the name derived from Rodfall and translated it as ‘a rod’s clearance of woodland’.[fn3] However, a possible origin is Ród Fál. According to the Royal Irish Academy’s Dictionary of the Irish Language, a proto-Celtic or medieval Irish translation would be Ród, meaning ‘Road,’ and Fál, meaning ‘Enclosure.’ Therefore, the road to the enclosure.[fn4]

A significant advancement occurred when Simon Terry from Three-Dimensional Cube offered the opportunity to acquire more comprehensive LiDAR imagery (Fig 6). See KAS issue 126 ‘LiDAR Investigations of the Kent Landscape’ for more of Simon’s work. By conducting a thorough analysis of various aerial photographs, including a German reconnaissance image from World War II and the newly obtained LiDAR data, I was able to achieve more precise mapping of the site, albeit constrained by the limitations of remote sensing alone (Fig 7).

[fg]jpg|Fig 4 - Remains of Defences, for scale, the person is six feet tall. Alfie Ellis (2025).|Image[/fg]

[fg]jpg|Fig 5 - Inner Ditch. Alfie Ellis (2025).|Image[/fg]

[pg52]The results revealed a multivallate hill fort, likely Iron Age in date. This fortification is characterised by two circular banks and ditches, with a prominent perimeter ditch enclosing the entire site. The entrance shows similarities to that of Danebury Hillfort in Hampshire[fn5], albeit on a smaller scale. Furthermore, within the confines of the fort’s boundary at the northern end, there appears to be a smaller and earlier penannular enclosure, which may potentially represent a barrow. There are many additional unidentified features to be investigated.

It is posited that the Radfall likely originated in a smaller trackway built and used by prehistoric or Iron Age communities, potentially extending the historical narrative by at least an additional millennium. The double banks were likely added later. This relationship, however, cannot be resolved remotely. Situated in a strategically significant location with direct routes to Canterbury, it is plausible that this road and fort served multiple periods before its eventual disuse. Furthermore, as the Radfall descends from the fort towards Canterbury, it is accompanied by several notable features, including a small, enclosed area that may represent a minor fortification on a crest just before the road descends towards Canterbury (Fig 8). The hill is further fortified naturally by the Sarra Penn.

During the Iron Age, this waterway would have been characterised by greater width and more substantial tidal influence, as the Isle of Thanet was separated from the mainland by an estuary.[fn8]

[fg]jpg|Fig 7 - Map of Features. Alfie Ellis (2025) over: Archi Uk (2025) Knockhimdown Hill [LiDAR Image]. Available at: https://www.archiuk.com/.|Image[/fg]

[fg]jpg|Fig 6 - Enhanced LiDAR Image. © Simon Terry. (2025).|Image[/fg]

[pg53]Numerous questions remain. The hillfort, aptly nicknamed ‘Camp Cunliffe,’ merits further academic study and archaeological investigation. The true extent of the site and its relation to and importance for local history can only be thoroughly addressed through comprehensive ground-based studies, examinations, and research. It is hoped that the Kent Archaeological Society (KAS), in collaboration with archaeology students from Canterbury Christ Church University, will have the opportunity to pursue further investigations in this area.

[fg]jpg|Fig 8 - Figure 8. Feature next to Radfall. Archi UK (2025) Knockhimdown Hill [LiDAR Image]. Available at: www.archiuk.com/.|Image[/fg]

If you are planning to visit the site, please use the footpath, stick to the field edges, and remember that you are in pristine ancient woodland. Please respect and treat it accordingly.

Alfie Ellis is a first-year Archaeology Student at Canterbury Christ Church University.

Bibliography

Allen, T. (2004) ‘Swine, salt and seafood: a case study of Anglo-Saxon and early medieval settlement in north-east Kent.’ Archaeologia Cantiana, 124, pp.117-35. Available at: www.kentarchaeology.org.uk/journal/124/swine-salt-and-seafood-case-study-anglo-saxon-and-early-medieval-settlement-north

Cunliffe, B. (2005) Iron Age Communities in Britain: An Account of England, Scotland and Wales from the Seventh Century BC until the Roman Conquest.4th Edition. Abingdon: Routledge.

Edil. (2026) Electronic Dictionary of the Irish Language, eDIL. Available at: https://dil.ie/ (Accessed 27 Feb 2026).

Everitt, A. (1976) ‘The Making of the Agrarian Landscape of Kent’, Archaeologia Cantiana, 92, 1-3. Available at: www.kentarchaeology.org.uk/Research/Pub/ArchCant/Intro.htm

Parish, W. and Shaw, W. (1887) ‘A Dictionary of Kentish Dialect and Provincialisms in Use in the County of Kent.’ English Dialect Society 20, (2).

Wallace, L. and Mullen, A. (2019) ‘Landscape, Monumentality and Expression of Group Identities in Iron Age and Roman East Kent’, Britannia, 50, 75–108. doi:10.1017/S0068113X19000308.

[fn]1|Everitt 1976, 16-19; Allen 2004[/fn]

[fn]2|Parish and Shaw, 1887, 125[/fn]

[fn]3|Allen 2004[/fn]

[fn]4|Edil 2025[/fn]

[fn]5|Cunliffe 2005, 371[/fn]

[fn]6|Wallace 2019, 77[/fn]