Wanstone Battery - a brief history

Ammunition

The 15-inch (380mm) diameter shells were approximately 5ft 3in long (1.6m) and weighed 1938 lbs (900 kg). Shells were stored in racks in the four heavily reinforced magazines, two for each gun. Overhead cranes stacked the arriving shells and manoeuvred the stored shells onto trolleys, pulled by small diesel tractor vehicles, for delivery to the gun.

Within the magazines, a smaller room, elevated above ground level to avoid any possibility of flooding, held the cordite propellant charges. Each shot required a full charge of cordite weighing 428 lbs (195 kg), or for added range, the gun could be supercharged to 490 lbs (223 kg).

Unlike the weapons installed on ships, where shell and charge transport was highly mechanised, shell and charge handling for these land-based guns was mostly a manual exercise. A small hoist was positioned to the rear of the gun’s breech to lift and swing the shell into the loading position. The shell was then pushed into the barrel with a powered ram and the propellant loaded behind.

Infrastructure

The two guns were served by a branch railway line from Martin Mill, with the line splitting at the 'Jane' emplacement to pass both in front and behind the gun. The lines behind the gun emplacement were used primarily for shell delivery to the magazines, those in front for heavy-duty rail-mounted cranes for barrel replacement. Although these were mostly removed during demolition, the remains of the rails can be seen in the concrete emplacement of ‘Jane’ today. The rail lines at Clem ran in front of the gun only but served the same purposes.

Buildings alongside the gun emplacement housed the compressor (for clearing the barrel of hot fragments with compressed air after firing), maintenance equipment and spares, lamps for emergency lighting and weapons to defend the emplacement against possible parachutist attacks.

Behind the gun, was the crew shelter and accommodation Nissen huts. Unlike the German coastal guns, there were no reinforced concrete defences – protection was provided by the natural topography, earth bunds and camouflage – the truncated supports for which are still visible.

As with most other coastal emplacements, Wanstone battery was equipped with a deep shelter and plotting room. The deep shelters were mainly tunnels excavated into the chalk by the Royal Engineers while the plotting rooms were built as ‘cut and cover’ concrete structures by the construction companies. The sites were powered by mains electricity from the high voltage supply via substations located nearby and mains water was laid on from St Margaret’s.

Achievements

The battery fired approximately 1150 rounds during its life, engaging with and damaging enemy shipping, and achieved one notable sinking – that of the Munsterland in January 1944. During the capture of the German coastal guns on 17 September 1944, Jane and Clem provided covering fire onto the French mainland, scoring a direct hit on the A6 battery (Lindemann No. 2). This in turn caused a sympathetic explosion of ordnance that severely damaged the gun and the massive concrete emplacement. This was the last enemy action for the Wanstone guns.

Barrel wear was a persistent problem for these guns, particularly when supercharged with extra propellant to extend the range beyond the Strait. Early barrels could withstand 150 rounds before reconditioning, but only around 50 rounds with full supercharging. Later barrels were made easier to reline and improvements in steel quality and design meant that the barrel would endure around 340 standard shots.

Post war

Dismantling of Winne and Pooh started in 1944 and many other sites met similar fates soon after hostilities ceased. Two Dover batteries, Fan Bay and Wanstone were taken over by the 4th Coast Training Regiment and records show that intermittent firing took place until 1952. By then the weapons had been superseded by more advanced ammunition and missiles and were too costly to maintain. Their role ceased.

The massive barrels and gun mountings of ‘Jane’ and ‘Clem’ were considered too old and costly to retrieve intact, and in 1957 demolition by a local company, Dover Industries, started. The thick steel barrels and gun mountings were cut up for scrap with oxy-acetylene torches. The remaining reinforced concrete emplacements and buildings had no scrap value and were too costly to remove, and the land was handed back for agriculture with these intact.

Post Demolition

Over the following years, the earth bunds around the guns and the crew shelters were bulldozed into the gun pits to make way for agricultural ploughing. The concrete structures and buildings that remained, were either buried or left to become overgrown. For 59 years, from 1958 to 2017 much of the land was intensively farmed.

The 2017 acquisition

In mid-2017, the opportunity arose for the National Trust to acquire 72 Hectares (178 acres) of the Wanstone area, which included the sites of guns Jane and Clem, the D2 (Dover 2, but also referred to as ‘Dog 2’ or ‘Don 2’, as this was prior to the NATO alphabet introduction in 1955) heavy anti-aircraft battery and the Fan Bay gun battery, from the owner. By late September 2017, following a successful appeal aided by the late Dame Vera Lynn, acquisition by the Trust was complete. The sites could now be conserved with the future potential to open parts of them as a visitor experience and an educational resource.

Work since 2017

Following acquisition, the sites were surveyed photographically, and a programme of work put in place to clear invasive vegetation, and to secure and conserve the above ground structures, while minimising impact on wildlife. Most of the wilderness areas of thorn bushes and scrub, that had established on the land that had not been farmed, have been kept for bird nesting space. ‘Dead hedging’ has been created from the bushes that were removed from the buildings, providing habitats for invertebrates and further nesting opportunities.

Our contractor cleared the concrete roads that remained of moss and leaf mulch accumulation. All buildings associated with the ‘Jane’ emplacement were secured with new steel doors and window shutters to the same design as those originally used. The buildings were successively made weatherproof by replacing the roof vents with an original design, repairing the concrete roofs and replacing the badly deteriorated bituminous roofing material. The 'Clem' gun site was fenced, and we worked to stabilise the brickwork on the 'Jane' magazines, which has delaminated in places.

Plans were drawn up for a new substation that would be capable of supplying electrical power to the Wanstone 'Jane' site, Fan Bay Deep Shelter, gun emplacement and plotting room. This would coincide with installing a new water supply for grazing troughs, minimising costs. Cables and some pipes were laid, but before this could be completed, Covid-19 struck. Water and power were eventually connected in June 2022.

In early 2022, we were awarded a £199,000 grant by the National Lottery Heritage Fund for a three-year project to enable a full excavation of 'Jane' and excavations at Fan Bay and 'Clem' as well as conservation work to the buildings and other artefacts.

Wanstone Rediscovered Project 2022-2025

Prior to 2022, little was known of how much of the ‘Jane’ emplacement had survived. An exploratory dig had revealed that most of the surface of the concrete emplacement, shown on Wartime plans, was likely to be intact. There was, therefore, a high probability that the gun pits would have also survived. This led to the exciting prospect of archaeology being able to fill in some of the missing parts of the story of the emplacement.

In July 2022 a week-long dig, supervised by professional archaeologists from Isle Heritage Community Interest Company (CIC), and aided by some expert excavator work by Rhino Plant Hire, was held at the Jane emplacement. The aim was to excavate the gun base, pintle and breech pit, along with the back-filled forward apron and the training rail platform. The work revealed a massive structure that was in excellent condition. Although few artefacts were recovered, relics of the demolition process existed, with cut-off rivet heads in abundance and much iron slag in the breech pit, from the flame cutting process. The original ladder to the breech pit was found semi-intact.

Analysis of the material removed from the emplacement showed a strong compatibility with existing soil on the site, confirming the likelihood that the bund structures had indeed been dozed into the gun pit. Evidence of foreign material, including brick and concrete block rubble of types not found on the site, suggested that some imported waste may have been dumped into the structure at some point in the past.

Beyond 'Jane'

Since the excavation in 2022, much work has been done to improve drainage on the site, install power and water to the buildings and further conserve and secure the buildings.

Further archaeological discoveries at 'Jane' such as many of the cables that connected to the gun, have given us more insight on how the gun actually worked.

At 'Clem', we were unable to fully excavate the gun emplacement within the financial scope of the project, due to geological conditions and the sheer amount of soil that would need to be removed from the site. The rear of the emplacement was excavated to gun-ring level and the gun store, previously completely buried, was rediscovered, secured and conserved. An earth embankment, some 3m high was been created to stabilise the site and prevent erosion.

We hope that at some stage in the future we may be able to continue the excavation of 'Clem'; however, given the proximity of the fully excavated 'Jane' emplacement and the similarity of the two, we have, at the very least, given context to the site.

The project finished in June 2025, having achieved all of its major objectives on time and to budget. You can read more about what we achieved on our Wanstone Rediscovered project page, where you will find our blogs that highlight our achievements and will keep you up to date with our ongoing work.

We have since been awarded a further grant from the National Trust's Neptune fund, to enable further conservation and vegetation management work. This project started in July 2025, will run for two years and will also see the formation of the vision for the visitor experience - the ultimate goal of the projects.

Credits

We are indebted to the National Lottery Heritage Fund and the Trustees of the National Trust for their generous grants. We would also like to thank the generous local donors, our partner organisations and local schools and businesses for their contributions to the project. Finally, thanks to our team of dedicated volunteers for their incredibly enthusiastic and diverse support to the project.

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