Defence of Britain Archive

Council for British Archaeology, 2002 (updated 2006)

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Council for British Archaeology (2006) Defence of Britain Archive [data-set]. York: Archaeology Data Service [distributor]

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Very unusual concrete caltrops (2) [portable anti-tank obstacles made of iron and concrete in the form of an anti-cavalry metal caltrop] still positioned by the side of the road. One stands on a concrete pull-off to a field and the other is embedded in a hedge. They are the survivors of some 10-14 such caltrops at this spot, the remains of a roadblock. The recorder recalls these defences as an evacuee child during the war, and has paid visits there since.
(Source: Field Visit 1999/01/23)

Type of site CALTROP
Location On the W side of the B556 road by a field gate, 100 yards N of the N exit from South Mimms service station.
Area South Mimms, Hertfordshire, England
Grid reference TL 218 015 (Scale: 1:50000 )
Period WW2
Condition Fair
Materials Concrete, Iron
Threats Type: Deterioration (Medium Term)
Detail: One of the caltrops has deteriorated between 1996-1999, by frost and vehicle impact.
Recorder Korving, John P. de G.
Defence grouping London Stop Line: Outer - Line A (outer suburbs) of London defence rings.
Attached Sheets (4) - correspondence on the site.
Photographs View of CALTROP - S0005658
(1) - site view - DIGITISED
DOB site reference: S0005658
Event Field Visit, During 1996
Construction, In the period 1940 1941
Field Visit, During 1999/01
Demolition, partial, In the period 1945 1946