A watching brief during the restoration of Charlotte Square revealed the partially demolished remains of a Second World War air raid shelter. It was typical of the Covered Trench Shelter design of 1939 - constructed of prefabricated concrete panels which linked together at the base, sides and roof, to form a concrete oblong box. It was accessed by a flight of steps from the surface.

This ROC monitoring post was built in 1960. The choice of site is likely to have been related to topography, security and ease of purchase of the land, rather than due to proximity to the Regional War Room (HER 5035). These posts were intended to be manned during times of tension, to monitor the location and power of nuclear detonations and the progress of radioactive fallout, so that the population could be warned, and Civil Defence measures effectively managed. They operated in clusters of three posts linked by telephone and radio cables, meaning that readings could triangulated with independence from peace-time telephone system. The posts were manned by observers. A bunk-bed and basic toilet facilities were provided. Food had to be prepared in the post. No air filtration system was installed. Half of the ROC posts, including Kenton, were abandoned after the 1968 defence cuts. Some however remained in use until 1991 when the ROC was finally disbanded. The Kenton example is visible above ground as a low grassy mound approximately 10m long by 4m wide by 1m high. The main entrance, main ventilator shaft and two masts for the bomb-power and fall-out monitoring devices are visible. The entrance is a concrete shaft 1m square and 0.85m high with a counterweighted steel hatch. On the eastern side of the entrance shaft is a 0.55m square mount for a warning siren. The ventilator is also of concrete, measuring 0.65m square and 0.85m high. The openings on the north and south sides are covered with louvred timber shutters. The two sensor masts are 0.7m tall. The interior is accessed by a ladder attached to the west wall of the entrance shaft. At the base of the shaft is a shallow sump covered by a metal grating to allow water to be pumped out via the hand pump fixed to the north wall. On the eastern side of the entrance shaft is a small room measuring 0.95m x 0.85m, which once held an elsan toilet. The main room measures 4.5m x 2.26m and contained a table and cupboard. Directly above the table was a mount for the bomb-power indicator, used to calculate the power and bearing of a nuclear detonation. The connections for a telephone are still attached to this wall. The south wall has a small opening 1.5m from floor level, covered with a sliding steel plate, which opens into a shaft into the main ventilator. The interior is painted light grey. A battery charging log and cardboard dial were recovered from the post.

Electricity substation built in 1940. A single-storey flat-roofed brick structure surrounded by a windowless brick-fronted concrete blast wall. The blast wall is of reinforced concrete with red-brick facing which appears to be in Flemish bond. It encloses an area measuring 14.22m x 16.26m. The wall is around 3.3m high and 0.80m thick, topped with thin concrete coping. It entered by double-width openings in the north and south walls topped with a reinforced concrete lintel. The interior walls of the substation are faced with ceramic tiles. The building measures 5.38m high, 9.08m by 12.8m. The north elevation of the substation a has a pair of tall double doors with overlights either side of a central long rectangular window. The south facing elevation has a tall double door with overlight towards its eastern end with a pair of central rectangular windows. The roof is of shallow hipped construction.

West Chopwell farmhouse predates the first edition OS, probably of comparable date to the original Chopwell Hall (c1721). Stone-built with a former gingang on the north side of the building. Much restored and converted into holiday accommodation.

At the dissolution of the monasteries, the lands of Chopwell Grange passed to the Swinburn family, the sitting tenants. The land was confiscated from the Swinburns in 1569. Much of the land was retained by the Crown but the remainder of the estate was granted to Sir Robert Constable, on whose death in 1595 the land was again seized by the crown and leased to Ambrose Dudley. Nine years later the estate was restored to the Constable family, who promptly renewed the lease to Dudley. By the middle of the C17 the estate passed to the Clavering family and in the C18 to the Cowper family. On the Clavering Estate plan of 1721 (NRO 390/M/142) a large house/tower is shown on the site of the later Chopwell Hall. Also shown on the Cowper Estate plan of 1793. Ordnance Survey first edition of 1850 shows the Hall as an L-shaped building within an irregular enclosure. By 1890 the small outbuilding at the west side of the farmyard had been rebuilt, and the west end of the main range had been altered. By 1940 the western end of the Hall had been demolished, and all of the complex by 1950. A photograph of Chopwell Hall (reproduced in Hordon and Wright 1995) shows an agricultural building with small, high-set windows, of rough-hewn stone with roughly faced and squared quoins and steeply pitched gabled roof. The authors date the construction of the Hall to 1615

Shown on Ordnance Survey second edition.

Shown on Ordnance Survey first edition.

Shown on Ordnance Survey first edition.

Shown on Ordnance Survey first edition.

Shown on Ordnance Survey first edition as Wesleyan. Shown as United Methodist on 1896 map. In use until 1965.