At the beginning of June, all the commemoration events for the 80th Anniversary of the D-Day Landings got me thinking about how land-locked Wiltshire would have been involved in repelling a German invasion and what evidence was recorded in our Historic Environment Record.
A series of defences, known as General Headquarters Anti-Tank Line or "GHQ stop-lines”, utilising natural and man-made features were constructed across England between late May and September 1940 to counter an imminently expected German invasion. The main GHQ stop-line was split into sections, several of which ran through or touched Wiltshire:
• Stop-Line Green ran from the Somerset coast north-east to Trowbridge, Melksham, Lacock and Chippenham, and then north-west into Gloucestershire.
• Stop-Line Blue branched east from Stop Line Green at Semington near Trowbridge, and followed the Kennet and Avon Canal eastwards.
• Stop-Line Red ran south from Oxford across the Cotswolds to Great Somerford.
These were reinforced with many features that can still be seen today: concrete pillboxes, gun emplacements, anti-tank obstacles and trench systems, etc.
Between April 1995 and December 2001, The Defence of Britain Project set out to record the 20th century militarised landscape of the United Kingdom. This was published by the Council for British Archaeology and is available online here
During this project and subsequently, volunteers have spent hundreds of hours recording Anti-Invasion structures – members of the Pillbox Study Group in particular.
All this research has resulted in a fantastic database of these structures, which in turn has been transcribed onto the Wiltshire and Swindon HER by our own volunteers. When cataloguing entries, we refer to the Defence of Britain Thesaurus – a standard set of terminology relating to the Second World War that contains some fascinating terms including ‘Bison mobile pillbox’, 'Lyon Light emplacement’, ‘Allan Williams turret’, ‘Seagull trench’, ‘spider billet’ – sadly we don’t have all of these types in Wiltshire, but we do have a cluster (or flock?) of Seagull trenches in the north of the county (e.g. MWI78776).
Many of the features we have recorded can still be seen in the landscape, so get out and about and see how many you can spot – here are some examples (although we can’t guarantee they will still be in place). The MWI numbers can be looked up on our HER for more information.