Exploring Kent's Past

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Monument details

Summary

This is a rare surviving example of a Bofors Light Anti-aircraft gun which formed part of the defence of West Malling airfield. It stands close to a modern development on the A228.

The concrete and brick tower appears to be of the DFW 55087 type which was designed at the end of 1939 and early examples constructed in the first half of 1940. Its purpose was to defend the airfield from low flying enemy aircraft.

The tower stands about 20m high and consists of 2 parallel, independent structures about 1m apart and linked by cantilevered concrete bridges. Each tower was built with 4 levels, 3 containing the magazine and accommodation chambers.

The gun emplacement was sited on the flat concrete roof.

The towers are mainly derelict.

Monument Types

• ANTI AIRCRAFT BATTERY (Modern - 1940 AD to 2050 AD)

Full description

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A rare surviving example of a Bofors Light Anti-aircraft gun tower survives close to a modern roundabout, on the A228, which formed part of the defence for West Malling airfield. The concrete and brick tower appears to conform to the "DFW 55087", type which was designed at the end of 1939, with the earliest examples constructed during the first half of 1940. The tower was designed to raise a 40mm Bofors gun and its operational equipment, above surrounding obstacles in order to achieve an all-round field of fire indefending the airfield from low flying enemy aircraft.

The tower stands to a height of about 20 m and consists of two parrallel, independent structures, separated for much of their height by a 1m gap and linked at intervals by cantilevered concrete bridges to allow movement between the towers. At ground level, the gap functioned as a passageway, providing access to the chamberes on either side. THe combined structure measures 9m from north to south by 4m east to west and each tower was constructed on four levels: three internal levels contained the magazine and accommodation chambers, lit by vertical two-light windows. THe emplacement was located on the flat concrete roof, which projects beyond the brick walls of the tower and was reached via a ladder from the chamber below. The ordnance was centrally mounted on the roof of the northern tower and was served by ammunition lockers at each corner of the roof space. The roof of the southern tower supported the target predictor and was separated from the gun platform by a narrow intervening gap, above the passage below, to insulate this sensitive equipment from the vibration of the Bofors gun.

This is only one of three examples recorded on airfields nationally.(1)

The towers are mainly derelict but a room at the base of the western tower holds electrical equiopment connected with the operation of the nearby Business Park. (2)

From the National Heritage List for England
The monument, which falls into three separate areas, includes a Bofors Light Anti-aircraft gun tower, a Pickett-Hamilton fort and a Type 24 pillbox. These structures formed part of the World War II defences of West Malling airfield, situated at Kings Hill, on top of the Greensand ridge, about 5km west of Maidstone. West Malling opened in 1930 as a private airfield for the Maidstone School of Flying, and was subsequently registered as Maidstone airport two years later. With the outbreak of World War II the airfield, which fell within Fighter Command's strategically important 11 Group (that part of Fighter Command covering the south east of England), was requisitioned by the RAF and soon re-opened as a front line fighter station in June 1940, and a satellite airfield to Biggin Hill, the principal fighter station in the area. A series of German bombing raids in August 1940 rendered the airfield unserviceable during the Battle of Britain, although it became a leading night fighter station the following year and played a key role in the 1944 campaign, code named Operation Diver, to defend the South East against the V1 flying bomb. With the end of the war West Malling became the main rehabilitation centre for prisoners of war returning from Germany. By this time its former grass runways, reinforced with Somerfield track (a heavy steel netting), had been replaced in concrete to meet the needs of the new jet aircraft. After the war the airfield was used for peacetime training, and during the 1960s the station was placed on `care and maintenance' by the RAF. The site was acquired by Kent County Council in 1970 and many of the airfield buildings are now used as offices by Tonbridge and Malling Borough Council. Since the 1990s, parts of the airfield have been lost to modern development. With the deepening threat of German invasion, the defence of Britain's airfields became a high priority during 1940. Fear of German `blitzkrieg' or `lightening' war tactics (involving rapid assault by air and seaborne troops, as witnessed in Europe in the Spring of 1940), led to the implementation of a national strategy for the defence of airfields in September 1940. West Malling was identified as one of 149 important airfields, located within 20 miles of vulnerable ports which could be targets for seaborne landings. Heavy defence of these airfields was therefore crucial to prevent capture of strategic landing grounds by enemy paratroops or gliderborne forces, rapidly followed by the arrival of transport aircraft carrying the principal invasion force. By the end of 1940, three Pickett-Hamilton forts had been installed at West Malling. These structures were designed in June 1940 by the New Kent Construction Company, specifically for the close defence of airfield runways. One of these forts was located towards the northern end of the flying field and survives next to what is now a modern access track. The structure consists of two, vertically sunken concrete cylinders, one mounted inside the other. The inner cylinder, known as the lifting head, remains in its lowered position, flush with the ground surface. The lifting head, pierced with three apertures for its main Vickers or Bren gun, was designed to be raised to its firing position by means of a pneumatic jack, supplemented by a manual pump for emergency use. The fort retains most of its original features, including its internal operating equipment as well as the access hatch in the lid of the lifting head through which the crew of two men entered at ground level. The second fort was removed from the airfield in 1983, and survives on display at the Imperial War Museum, Duxford. The location of the third fort has not yet been identified. Adjacent to the southern perimeter track at West Malling is a Type 24 hexagonal pillbox which originally formed part of an inner and outer series of about 20-30 pillboxes. The small squat structure measures about 6m by 5.5m and is entered through a doorway on its longer eastern side. The entrance is protected by a low externally attached brick wall, and is flanked by one of two loopholes, the second of which is located in the opposite wall of the pillbox. In accordance with orders issued in 1941, the walls of the original brick built structure were thickened by the external application of reinforced concrete, and evidence suggests that at least two additional loopholes were also blocked at this time. These measures were intended to strengthen pillboxes at vulnerable locations against heavy German artillery. The presence of a recess in the edge of the roof above each opening suggests that further protection for the gun crew may have been provided in the form of shields, designed to deflect flame-throwers. A rare surviving example of a Bofors Light Anti-aircraft gun tower also survives close to a modern roundabout, at the north western approach to the airfield. The concrete and brick built tower appears to conform to type `DFW 55087', which was designed at the end of 1939, with the earliest examples constructed during the first half of 1940. The tower was designed to raise a 40mm Bofors gun and its operational equipment, above surrounding obstacles in order to achieve an all-round field of fire in defending the airfield from attack by fast moving, low flying enemy aircraft. The tower stands to a height of about 20m and consists of two parallel, independent structures, separated for much of their height by a 1m gap and linked at intervals by cantilevered concrete bridges to allow movement between the towers. At ground level, the gap functioned as a passageway, providing access to the chambers on either side. The combined structure measures 9m from north to south by 4m east to west and each tower was constructed on four levels: three internal levels contained the magazine and accommodation chambers, lit by vertical two-light windows. The emplacement was located on the flat concrete roof, which projects beyond the brick walls of the tower and was reached via a ladder from the chamber below. The ordnance was centrally mounted on the roof of the northern tower and was served by ammunition lockers at each corner of the roof space. The roof of the southern tower supported the target predictor and was separated from the gun platform by a narrow intervening gap, above the passage below, to insulate this sensitive equipment from the vibration of the Bofors gun. Several temporary station buildings survive around the airfield perimeter. These derelict structures include externally rendered, temporary brick buildings, dispersed from the main technical site in anticipation of concentrated bombing raids. These structures are not included in the current scheduling. Among the more architecturally sophisticated airfield buildings, the Neo-Georgian style Officers' Mess is Listed Grade II. Several semi-sunken Stanton air raid shelters survive, in buried form, near the barrack buildings. These are infilled and are not therefore included in the scheduling. Other structures associated with the defence of the airfield, such as the battle headquarters and the protected aircraft dispersal pens, were destroyed towards the end of the 20th century, although further, as yet unidentified elements may survive beyond the area of the monument. All modern fixtures and fittings associated with the Bofors tower, including modern doors and window boxes, and all modern materials and equipment stored within the tower are excluded from the scheduling; the ground beneath these features, or the structures to which they are attached, however, is included.

The monument, which falls into three separate areas, includes a Bofors Light Anti-aircraft gun tower, a Pickett-Hamilton fort and a Type 24 pillbox. These structures formed part of the World War II defences of West Malling airfield, situated at Kings Hill, on top of the Greensand ridge, about 5km west of Maidstone. West Malling opened in 1930 as a private airfield for the Maidstone School of Flying, and was subsequently registered as Maidstone airport two years later. With the outbreak of World War II the airfield, which fell within Fighter Command's strategically important 11 Group (that part of Fighter Command covering the south east of England), was requisitioned by the RAF and soon re-opened as a front line fighter station in June 1940, and a satellite airfield to Biggin Hill, the principal fighter station in the area. A series of German bombing raids in August 1940 rendered the airfield unserviceable during the Battle of Britain, although it became a leading night fighter station the following year and played a key role in the 1944 campaign, code named Operation Diver, to defend the South East against the V1 flying bomb. With the end of the war West Malling became the main rehabilitation centre for prisoners of war returning from Germany. By this time its former grass runways, reinforced with Somerfield track (a heavy steel netting), had been replaced in concrete to meet the needs of the new jet aircraft. After the war the airfield was used for peacetime training, and during the 1960s the station was placed on `care and maintenance' by the RAF. The site was acquired by Kent County Council in 1970 and many of the airfield buildings are now used as offices by Tonbridge and Malling Borough Council. Since the 1990s, parts of the airfield have been lost to modern development. With the deepening threat of German invasion, the defence of Britain's airfields became a high priority during 1940. Fear of German `blitzkrieg' or `lightening' war tactics (involving rapid assault by air and seaborne troops, as witnessed in Europe in the Spring of 1940), led to the implementation of a national strategy for the defence of airfields in September 1940. West Malling was identified as one of 149 important airfields, located within 20 miles of vulnerable ports which could be targets for seaborne landings. Heavy defence of these airfields was therefore crucial to prevent capture of strategic landing grounds by enemy paratroops or gliderborne forces, rapidly followed by the arrival of transport aircraft carrying the principal invasion force. By the end of 1940, three Pickett-Hamilton forts had been installed at West Malling. These structures were designed in June 1940 by the New Kent Construction Company, specifically for the close defence of airfield runways. One of these forts was located towards the northern end of the flying field and survives next to what is now a modern access track. The structure consists of two, vertically sunken concrete cylinders, one mounted inside the other. The inner cylinder, known as the lifting head, remains in its lowered position, flush with the ground surface. The lifting head, pierced with three apertures for its main Vickers or Bren gun, was designed to be raised to its firing position by means of a pneumatic jack, supplemented by a manual pump for emergency use. The fort retains most of its original features, including its internal operating equipment as well as the access hatch in the lid of the lifting head through which the crew of two men entered at ground level. The second fort was removed from the airfield in 1983, and survives on display at the Imperial War Museum, Duxford. The location of the third fort has not yet been identified. Adjacent to the southern perimeter track at West Malling is a Type 24 hexagonal pillbox which originally formed part of an inner and outer series of about 20-30 pillboxes. The small squat structure measures about 6m by 5.5m and is entered through a doorway on its longer eastern side. The entrance is protected by a low externally attached brick wall, and is flanked by one of two loopholes, the second of which is located in the opposite wall of the pillbox. In accordance with orders issued in 1941, the walls of the original brick built structure were thickened by the external application of reinforced concrete, and evidence suggests that at least two additional loopholes were also blocked at this time. These measures were intended to strengthen pillboxes at vulnerable locations against heavy German artillery. The presence of a recess in the edge of the roof above each opening suggests that further protection for the gun crew may have been provided in the form of shields, designed to deflect flame-throwers. A rare surviving example of a Bofors Light Anti-aircraft gun tower also survives close to a modern roundabout, at the north western approach to the airfield. The concrete and brick built tower appears to conform to type `DFW 55087', which was designed at the end of 1939, with the earliest examples constructed during the first half of 1940. The tower was designed to raise a 40mm Bofors gun and its operational equipment, above surrounding obstacles in order to achieve an all-round field of fire in defending the airfield from attack by fast moving, low flying enemy aircraft. The tower stands to a height of about 20m and consists of two parallel, independent structures, separated for much of their height by a 1m gap and linked at intervals by cantilevered concrete bridges to allow movement between the towers. At ground level, the gap functioned as a passageway, providing access to the chambers on either side. The combined structure measures 9m from north to south by 4m east to west and each tower was constructed on four levels: three internal levels contained the magazine and accommodation chambers, lit by vertical two-light windows. The emplacement was located on the flat concrete roof, which projects beyond the brick walls of the tower and was reached via a ladder from the chamber below. The ordnance was centrally mounted on the roof of the northern tower and was served by ammunition lockers at each corner of the roof space. The roof of the southern tower supported the target predictor and was separated from the gun platform by a narrow intervening gap, above the passage below, to insulate this sensitive equipment from the vibration of the Bofors gun. Several temporary station buildings survive around the airfield perimeter. These derelict structures include externally rendered, temporary brick buildings, dispersed from the main technical site in anticipation of concentrated bombing raids. These structures are not included in the current scheduling. Among the more architecturally sophisticated airfield buildings, the Neo-Georgian style Officers' Mess is Listed Grade II. Several semi-sunken Stanton air raid shelters survive, in buried form, near the barrack buildings. These are infilled and are not therefore included in the scheduling. Other structures associated with the defence of the airfield, such as the battle headquarters and the protected aircraft dispersal pens, were destroyed towards the end of the 20th century, although further, as yet unidentified elements may survive beyond the area of the monument. All modern fixtures and fittings associated with the Bofors tower, including modern doors and window boxes, and all modern materials and equipment stored within the tower are excluded from the scheduling; the ground beneath these features, or the structures to which they are attached, however, is included.

<1> Department for Culture, Media and Sport, 2001, WWII Bofors AA Gun Tower, Pickett-Hamilton Fort and Pillbox: West Malling Fighter Station, RSM 34304 1-3 (Scheduling record). SKE7928.

<2> Victor T. Smith, 2001, Anti-Aircraft Gun Tower, West Malling Airfield (Unpublished document). SKE7929.

Sources and further reading

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