Heavy Anti Aircraft gunnery relied on large calibre guns intended to combat high flying aircraft. During WW2 this work was shared between five main types of weapon, ranging from a 3 inch 20 cwt gun, (the standard HAA waeapon during WW1 and used well into WW2) which could fire a shell to a height of 23,500 ft, up to a 5.25 inch Mk 2 gun, which could fire a shell up to 43,000 ft. Some of the first 5.25 inch batteries were positioned on the coast and had a dual coastal defence/anti-aircraft role. Until late 1940 virtually all HAA sites were temporary, consisting of earthwork gun pits and tented accomodation. Guns were generally mobile. As war progressed, these were replaced by permanent structures and static guns. A typical HAA gun site consisted of a command post (rectangular concrete or brick semi-sunken structure, often protected by earth banks), this was usually located at the centre of a 39.6m radius semi-circle of gun pits. There would also be one or two shelters, one for gun maintenance (limber gunner's shelter) and the other for the gun detachment. Ammunition was stored in magazines. Instruments and spare parts were kept in the gun store. Domestic HAA sites also had Nissen and timber huts, workshops and garages and often a sewage treatment plant.A concrete service road led from main gate via the magazine around the command post, with offshoots to each gun pit. In plan this gave the site a "four leaf clover" shape {"20th Century Defences in Britain, An Introductory Guide, Handbook of The Defence of Britain Project, 1995, pp 48-59}. Red Barns is exceptional in terms of character of the installation and degree of survival of the remains. Of over 1000 HAA sites across the UK, only 80 or so survive in any coherant form and Red Barns is one of the top ten or so surviving. Probably the best surviving pre-War example in the country, having the full range of operational and support buildings extant. Site put forward for Scheduling in response to a planning application for a quarry extension in 2001. Site was not Scheduled however, and arrangements are being made for full recording {July 2003] before the quarrying destroys the remains.

Heavy Anti Aircraft gunnery relied on large calibre guns intended to combat high flying aircraft. During WW2 this work was shared between five main types of weapon, ranging from a 3 inch 20 cwt gun, (the standard HAA weapon during WW1 and used well into WW2) which could fire a shell to a height of 23,500 ft, up to a 5.25 inch Mk 2 gun, which could fire a shell up to 43,000 ft. Some of the first 5.25 inch batteries were positioned on the coast and had a dual coastal defence/anti-aircraft role. Until late 1940 virtually all HAA sites were temporary, consisting of earthwork gun pits and tented accommodation. Guns were generally mobile. As war progressed, these were replaced by permanent structures and static guns. A typical HAA gun site consisted of a command post (rectangular concrete or brick semi-sunken structure, often protected by earth banks), this was usually located at the centre of a 39.6m radius semi-circle of gun pits. There would also be one or two shelters, one for gun maintenance (limber gunner's shelter) and the other for the gun detachment. Ammunition was stored in magazines. Instruments and spare parts were kept in the gun store. Domestic HAA sites also had Nissen and timber huts, workshops and garages and often a sewage treatment plant. A concrete service road led from main gate via the magazine around the command post, with offshoots to each gun pit. In plan this gave the site a "four leaf clover" shape {"20th Century Defences in Britain, An Introductory Guide, Handbook of The Defence of Britain Project, 1995, pp 48-59}. At Lizard Lane the gun emplacements survive. Of the 981 heavy anti-aircraft sites in England, only 57 are still complete or near complete and 119 have partial remains. Lizard Farm is therefore a significant survival (Schofield 2003). Recommend for Scheduling.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.

The pillbox is the most familiar type of C20 defensive building. Sometimes referred to as defence posts, blockhouses or police posts. Concrete pillboxes were first used by the Russians in the Russo-Japanese War. The concept was copied by the Germans in WW1 and later by the British. The majority of WW2 pillboxes were associated with beach defences, stop-lines and nodal points. Some were sited to defend coastal batteries, airfields, radar stations and factories. More than 18,000 were built during 1940. In June 1940 branch FW3 of the War Office Directorate of Fortifications and Works issued designs for about a dozen standard pillboxes. In practice a multiplicity of designs arose. However most pillboxes consist of a basic squat, heavily constructed building, usually flat-roofed, no more than 1.98m high and quadrilateral, polygonal or circular in plan. There were one or two entrances, sometimes protected by a porch or wall. They all have a series of horizontal slits (firing loops, loopholes or embrasures) to provide interlocking fields of fire over the anticipated direction of attack. Most pillboxes were designed for rifles or light machine guns. More heavily armed examples had Vickers machine guns, anti-tank guns or Hotchkiss guns. Pillbox walls are almost invariably of concrete, sometimes with brick shuttering or stone facing {Defence of Britain Handbook, 1995, pp 79-82}.