R30 Operations Room

Building Description

The R30 operations room is housed within the R30 operations block, a 1970s modification of the surface wartime operations block known as the 'Happidrome', which was completed on 15 July 1942.

Exterior

The R30 operations block is constructed in reinforced concrete. Originally it comprised a flat-roofed rectangular double-storey block to the north, with an annexe to the south. The northern block was extended to the west between 1948 and 1950, then completely refurbished in the 1970s to become the R30.

Interior

The operations room occupies the original northern block of R30. It is one storey high but has double-height ceiling space, with a suspended floor for cable runs. The radar consoles are arranged on stepped platforms, with the controller cabins positioned on the top level and reached by steps. There are no windows in the room, which is accessed via the southern block.

During the 1970s, this was the operational centre from which the detection and interception of intruding Soviet aircraft into UK airspace was coordinated. The layout of the room has been preserved and retains the original 1970s SLEWC (Standby Local Early Warning and Control) radar consoles and controller's cabins, which face illuminated glass tote boards.

The room is divided into two sections by a glazed partition wall. On the north side are three rows of radar consoles arranged in descending height towards high and low level glass tote boards mounted on a partition. Behind this is the Air Movement Liaison Cell, equipped with the computerised Air Defence Notification System. Set at a high level above the tote steps is the RINGO alert panel, which was used to scramble bombers and provide the alert for full-scale war. The room also contains radar consoles from RAF Watton, Boulmer, Buchan and Staxton Wold.

To the south of the glazed partition is the Master Controller and Sector Operations Centre. This is the senior executive level of the operations room and the sector operations room, and is complete with original wall displays and a large quantity of specialised communications and computer equipment.

The operations room is now open to the public as part of the RAF Air Defence Radar Museum.

Historical Context

RAF Neatishead opened in June 1941 as a Ground Control Intercept (GCI) Station, and its development was typical of many stations of this type. GCI stations were developed from late 1940 to assist in the tracking and interception of hostile aircraft after they crossed the coast, particularly at night. The original Chain Home radar system was strung out along the coast, and the tracks of enemy aircraft were lost as they headed inland. GCI stations were designed to counter this problem by tracking hostile aircraft as they passed inland and directing the local fighter squadrons to attack the intruders.

Typical of a first phase GCI radar station, RAF Neatishead initially comprised mobile caravans and a wooden guard house, all surrounded by a perimeter fence. Accommodation huts were added later. The second phase of building activity began in January 1942, when a timber operations hut (which survives in modified form, in use until recently as a dental and medical centre), a timber 'goalpost' gantry to support a Type-8 radar, and other ancillary structures were built. This phase is known as an 'Intermediate GCI Station'.

This was quickly followed by construction work for the last wartime phase, the Fixed or 'Final' GCI Station. Neatishead was one of 21 Final GCI Stations, and one of only 12 to be fully equipped with searchlight and fighter control. The main feature of this phase was the double-storey, protected operations room or 'Happidrome' (so named after a contemporary BBC comedy radio programme featuring a farcical music hall), which was completed on 15 July 1942. The station became operational in its final wartime form in January 1943.

Neatishead was retained after the end of the war. Following the Cherry Report, which examined Britain's post-war air defence requirements, it was recommended that the Sector Operations Centres should be combined with a number of GCI stations. Alterations to accommodate this, including the extension of the wartime Happidrome, began at Neatishead in December 1948 and were completed by October 1950.

In the early 1950s, as part of the Rotor scheme to refurbish Britain's radar defences, the R3 double level underground operations block was built, accessed by staircase in a rear annexe of a guardroom disguised as a 'bungalow'. On the surface, new protected radar plinths were constructed (the three examples at Neatishead are to be recommended for scheduling), and some distance away from the site, a standby generator building designed to resemble a church was built (to be recommended for listing).

By the late 1950s, as a result of a change in defence policy following the detonation of the Soviet H-bomb in 1953, the emphasis moved towards implementing the so-called 'tripwire response': air defences were scaled down to protect the nuclear deterrent bases and to give early warning of aggression by the Warsaw Pact in order that nuclear armed aircraft and missiles could immediately be launched, after which there would be little need for air defence.

In 1961, a new scheme known as 'Linesman' was approved to reconfigure Britain's radar defences to respond to the new strategic demands and new technology. Neatishead was just one of four stations where major rebuilding work took place as part of this scheme. Structures built in the early 1960s include the Type-84 and R17 modulator building (to be recommended for scheduling), the Type-85 radar and R12 bunker which housed its processing equipment (to be recommended for listing), High Speed Aerials, HF 200 height finders (footings of these may survive), and a new generator building.

A major setback occurred in 1966 when the R3 operations block was gutted by fire, with some loss of life. The radars, however, continued in use, sending their data to remote sites. Neatishead regained its operational role again in 1972 when the Standby Early Warning and Control (SLEWC) centre was established in the wartime Happidrome, or R30, as it became known following refurbishment.

By the time the Linesman system was fully operational in the 1970s, NATO policy had moved to one of 'flexible response', whereby the reaction to any Soviet aggression would not immediately be met with massive nuclear retaliation, but might begin with a conventional phase to allow time for negotiation. The system designed to replace Linesman was known as Improved United Kingdom Ground Defence Environment (IUKADGE). In place of fixed radar, new mobile systems were developed which used sophisticated electronics to counter jamming in place of the massive power input required by the earlier system. These were supplemented by the use of inputs from air and seaborne radars. Operations centres were provided with refurbished hardened bunkers, as exemplified by the R3 operations block at Neatishead. This system finally became fully operational in 1992.

Significance

RAF Neatishead is unique in being able to represent the changes to Britain's air defence policy throughout the Cold War until the present day. The R30 operations room at RAF Neatishead is a uniquely intact electronic 'frontline' from the Cold War of international importance. It reflects the 'tripwire response' under the Linesman scheme to update Britain's radar defences and is a time capsule of 1970s computer technology. The building is an imposing and significant element of the radar station, and forms part of a significant group of little altered contemporary structures which clearly reflect their function at the longest continuously occupied radar station in Britain, and probably the world.