NTCC St. Mawgan, or NATO Trunk Communications Centre St. Mawgan, was a vital communications hub located at RAF St. Mawgan in Cornwall, United Kingdom. Established during the Cold War, the unit served as a critical link in NATO’s secure communications network, facilitating command and control for allied forces across Europe and the Atlantic. Staffed by multinational personnel, NTCC St. Mawgan operated advanced signal and trunking equipment to ensure resilient communication channels during both peacetime operations and periods of heightened alert. The centre remained operational until the late 20th century, when advances in technology and changes in NATO’s strategic posture led to its eventual closure.