Receiver site and Royal Observer Corps Underground Nuclear Monitoring Post, former Swingate Chain Home Radar Station

The receiver site occupies a redundant and currently farmed location north-east of Swingate's transmitter site, on the prominent clifftop location above Dover. The site originally comprised a receiver building historically positioned within a trapezoidal enclosure, four wooden receiver towers, and associated structures. A pair of semi-detached houses that once stood at the west entrance, including presumed married quarters for the site warden, were demolished many years ago.

The receiver building is a protected 'A' type receiver block, a rectangular structure approximately 18 metres long by 9 metres wide, oriented north-south. It is constructed of red brick in English bond, with some parapet sections in Stretcher bond indicating rebuilding. The walls are externally rendered in places, particularly around an external traverse, and the building is topped by a flat reinforced concrete roof concealed behind a deep parapet. This roof space was originally filled with shingle to a depth of approximately 1.7 metres for blast dispersal and sealed with bitumen, which remains visible. Drainage holes pierce the parapet wall. The exterior features multiple windows and doors with concrete lintels and some timber frames, though other openings have been bricked up. Ventilation is provided by air-bricks and air conditioning extractor hoods.

The building is surrounded by an earth traverse for blast protection (except where a large detached concrete block of unknown function interrupts the north part of the east elevation), reveted externally by a low yellow brick wall and internally by a high concrete wall, creating a covered way. The main entrance on the east elevation is a dog-leg hardened entrance with reinforced concrete blast walls, now fitted with modern metal security doors. A further protected entrance exists to the north.

The interior follows the standardised layout of early receiver buildings built to Air Ministry drawing 4238/38, comprising a lobby, office, receiver room, calculator room, plant room, switch gear room, transformer cubicle, and WC. The original colour scheme survives: pale blue to dado rail height with cream and yellow paint above, accompanied by simple wooden architraves. A wide cable pit runs through the building's centre, originally housing cables from the receiver towers. Notably, substantial fixtures and fittings survive despite the building's derelict state, including light fittings, light switches, ceiling brackets indicating original cable tray positions, a water tank, a switchgear rack, and various electrical circuit boxes. One panel bears the maker's name 'Allen West & Co Brighton England', also found in the transmitter building. These items are not primary phase fittings but likely date to the early Cold War era.

Three of the four original receiver tower bases survive. These timber towers, designed by Mr Norman Garnish of the Air Ministry, were 240-foot self-supporting structures on concrete footings. The fourth tower base was demolished around 2000. Each surviving base comprises four concrete feet of square plan measuring approximately 3 square metres and tapering to a maximum height of 2.10 metres.

A Royal Observer Corps underground nuclear monitoring post is located within the original trapezoidal enclosure near the receiver site's western boundary. Constructed of reinforced concrete, it is accessed via a heavy 'Broads Pattern' iron hatch to the south, with an air vent to the north. Entry descends via a wall-fixed metal ladder into a small ante-room with a WC, from which the main chamber opens to the north. The concrete walls feature chamfered ceilings. The structure retains its original green-painted solid timber plank doors, toilet and seat, cupboard, fold-down table, and light fittings and electrics. A metal vent cover occupies the high north wall and a drainage grill sits in the ante-room floor. A 2004 site visit by Subterranea Britannica recorded internal furnishings including bunk beds, a single bed, and mattresses, though these were no longer present when inspected in 2010.

An Identification Friend or Foe cubicle is located against the receiver site's western boundary south-west of the receiver building. Although its brickwork has been patched, the original fabric appears to be of Second World War date, constructed of yellow brick in English bond. The small flat-roofed cubicle to the north has a west wall extending south to create a protected east entrance, with remains of its wooden door frame and an internal metal rack surviving. Overgrown concrete footings to the immediate east may relate to the IFF structure, though their form and function cannot be determined.