[4][5] The station was sited on a former wartime mortar range on Snod Hill, which had to be comprehensively cleared by RAF Bomb Disposal before building could begin.

[10] Between 1989[11][12] and 13 November 1992,[13] Raytheon, the US defence contractor, completed a contract that saw the domes replaced by the current tetrahedron ('pyramid') structure, originally housing the AN/FPS-126 AESA phased array radar system.

[14] In the late 1990s, the United States decided to pursue a National Missile Defense plan fully, and RAF Fylingdales attracted further publicity.

[15] To improve tracking capabilities (for launches from Africa and the Middle East) the United States wanted the use of Fylingdales as part of its NMD network.

[15] According to the BBC, The Independent reported that the British Government secretly agreed to the US request to station NMD missile interceptors at Fylingdales Moor in late 2004.

[17] The data obtained by Fylingdales is shared fully and freely with the United States, where it feeds into the US-Canadian North American Aerospace Defense Command at Peterson Space Force Base in Colorado Springs.

[18] The British Government advised in March 2018, that as of the beginning of that month, fewer than five United States military personnel and ten US contractors worked at the station.

[22] The functions of RAF Fylingdales have been subject to criticism from opposition groups, such as the Campaign for Nuclear Disarmament (CND), leading to protests being held on occasion.