WW2 pillbox at Freewarren Bridge near Crofton - geograph

The GHQ Line (General Headquarters Line) was a defence line built in the United Kingdom during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

to contain an expected

German German(s) may refer to: * Germany (of or related to) ** Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...

invasion An invasion is a military offensive in which large numbers of combatants of one geopolitical entity aggressively enter territory owned by another such entity, generally with the objective of either: conquering; liberating or re-establishing con ...

. The

British Army The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurk ...

had abandoned most of its equipment in

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

after the

Dunkirk evacuation The Dunkirk evacuation, codenamed Operation Dynamo and also known as the Miracle of Dunkirk, or just Dunkirk, was the evacuation of more than 338,000 Allied soldiers during the Second World War from the beaches and harbour of Dunkirk, in the ...

. It was therefore decided to build a static system of defensive lines around Britain, designed to compartmentalise the country and delay the Germans long enough for more mobile forces to counter-attack. Over 50 defensive lines were constructed across the country. After the coastal defences, the GHQ Line was the longest and most important, designed to protect

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

and the industrial heart of

Britain Britain most often refers to: * The United Kingdom, a sovereign state in Europe comprising the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands * Great Britain, the largest island in the United King ...

, and was considered to be the last chance of defence. The "green" section of the GHQ Line ran from the northern end of the

Taunton Stop Line The Taunton Stop Line was a World War II defensive line in southwest England. It was designed "to stop an enemy's advance from the west and in particular a rapid advance supported by armoured fighting vehicles (up to the size of a German medium ...

near Highbridge in

Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...

, along the

River Brue The River Brue originates in the parish of Brewham in Somerset, England, and reaches the sea some west at Burnham-on-Sea. It originally took a different route from Glastonbury to the sea, but this was changed by Glastonbury Abbey in the twelft ...

, across the

Mendips The Mendip Hills (commonly called the Mendips) is a range of limestone hills to the south of Bristol and Bath in Somerset, England. Running from Weston-super-Mare and the Bristol Channel in the west to the Frome valley in the east, the hills ...

from

Wells Wells most commonly refers to: * Wells, Somerset, a cathedral city in Somerset, England * Well, an excavation or structure created in the ground * Wells (name) Wells may also refer to: Places Canada *Wells, British Columbia England * Wells ...

and following the railway from Masbury into the Wellow valley. This joined the "blue" line which followed the

Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than solely to the cent ...

Reading Reading is the process of taking in the sense or meaning of Letter (alphabet), letters, symbols, etc., especially by Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifaceted process invo ...

. The green line continued from

Bradford-on-Avon Bradford-on-Avon (sometimes Bradford on Avon or Bradford upon Avon) is a town and civil parish in west Wiltshire, England, near the border with Somerset, which had a population of 9,402 at the 2011 census. The town's canal, historic buildings, s ...

along the river to

Malmesbury Malmesbury () is a town and civil parish in north Wiltshire, England, which lies approximately west of Swindon, northeast of Bristol, and north of Chippenham. The older part of the town is on a hilltop which is almost surrounded by the upp ...

where it met the "red" line which ran to Abingdon, along the

Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the R ...

Pangbourne Pangbourne is a large village and civil parishes in England, civil parish on the River Thames in Berkshire, England. Pangbourne has its own shops, schools, Pangbourne railway station, a railway station on the Great Western main line and a vill ...

and rejoined the blue line at

Theale Theale () is a large village and civil parish in West Berkshire, England, southwest of Reading and 10 miles (16 km) east of Thatcham. The compact parish is bounded to the south and south-east by the Kennet & Avon Canal (which here incorp ...

. The green line continued to

Avening Avening is a village and civil parish in the Cotswold district of Gloucestershire, England, about north of Tetbury. According to the 2001 census it had a population of 1,094, decreasing to 1,031 at the 2011 census. Nearby is Gatcombe Park ...

then down the valley to

Framilode Framilode is a village on the banks of the River Severn in Gloucestershire, England, in the parish of Fretherne with Saul. It consists of two settlements: the larger, Framilode, is at the mouth of the River Frome. The smaller settlement, Fra ...

, protecting the strategic areas of

Bristol Bristol () is a city, ceremonial county and unitary authority in England. Situated on the River Avon, it is bordered by the ceremonial counties of Gloucestershire to the north and Somerset to the south. Bristol is the most populous city in ...

Avonmouth Avonmouth is a port and outer suburb of Bristol, England, facing two rivers: the reinforced north bank of the final stage of the Avon which rises at sources in Wiltshire, Gloucestershire and Somerset; and the eastern shore of the Severn Es ...

, and

Sharpness Sharpness ( ) is an English port in Gloucestershire, one of the most inland in Britain, and eighth largest in the South West. It is on the River Severn at , at a point where the tidal range, though less than at Avonmouth downstream ( typical sp ...

. The eastern line was to run inland of the coast from

Essex Essex () is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and G ...

Edinburgh Edinburgh ( ; gd, Dùn Èideann ) is the capital city of Scotland and one of its 32 Council areas of Scotland, council areas. Historically part of the county of Midlothian (interchangeably Edinburghshire before 1921), it is located in Lothian ...

but was not completed. London was protected by the concentric rings of the

Outer London Defence Ring The Outer London Defence Ring was a defensive ring built around London during the early part of the Second World War. It was intended as a defence against a German invasion, and was part of a national network of similar "Stop Lines". In June 1940 ...

. On the section of the line in Essex, between

Great Chesterford Great Chesterford is a village and civil parish in the Uttlesford district of Essex, England. The village is north from Bishop's Stortford, south from Cambridge and about northwest from the city and Essex county town of Chelmsford. The Ickn ...

and

Canvey Island Canvey Island is a town, civil parishes in England, civil parish and reclaimed island in the Thames estuary, near Southend-on-Sea, in the Castle Point district, in the county of Essex, England. It has an area of and a population of 38,170.Office ...

, the defences were made up of around 400 FW3 type concrete pillboxes, which were part of the

British hardened field defences of World War II British hardened field defences of World War II were small fortified structures constructed as a part of British anti-invasion preparations. They were popularly known as '' pillboxes'', a reference to their shape. Design and development In M ...

. Well over 100 pillboxes still exist on this section in 2021, with around 40 highly visible FW3 Type 22, 24, 26, 27 and 28 boxes between the Rettendon Turnpike and Howe Green, mostly alongside the A130 road. Many more FW3s are still in place north of

Chelmsford Chelmsford () is a city in the City of Chelmsford district in the county of Essex, England. It is the county town of Essex and one of three cities in the county, along with Southend-on-Sea and Colchester. It is located north-east of London a ...

along the Chelmer Valley and towards

Great Dunmow Great Dunmow is a historic market town and civil parish in the Uttlesford district of Essex, England. It is situated on the north of the A120 road, approximately midway between Bishop's Stortford and Braintree, five miles east of London Stans ...

External links

{{commons category
UK World War 2 Invasion Defences

The Defence of Britain Project

A blog post featuring a map of the line
British World War II defensive lines Fortifications of London

See also

External links