Anthorn Radio Station

Anthorn Radio Station is a naval and government radio transmitting station located near Anthorn, Cumbria, England, overlooking the Solway Firth, and is operated by Babcock International (with whom former operators VT Communications are now merged). It has three transmitters: one VLF, one LF, and an eLoran transmitter. It is on the site of the World War II military airfield which was operated by the Fleet Air Arm as HMS Nuthatch.

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Time from NPL (MSF)

The Time from NPL is a radio signal broadcast from the Anthorn Radio Station near Anthorn, Cumbria, which serves as the United Kingdom's national time reference. The time signal is derived from three atomic clocks installed at the transmitter site, and is based on time standards maintained by the UK's National Physical Laboratory (NPL) in Teddington. The service is provided by Babcock International (which acquired former providers VT Communications), under contract to the NPL. It was funded by the former Department for Business, Innovation and Skills; as of 2017 NPL Management Limited (NPLML) was owned by the Department for Business, Energy and Industrial Strategy (BEIS), and NPL operated as a public corporation. The signal, also known as the MSF signal (and formerly the Rugby clock), is broadcast at a highly accurate frequency of 60 kHz and can be received throughout the UK, and in much of northern and western Europe. The signal's carrier frequency is maintained at 60 kHz to within 2 parts in 1012, controlled by caesium atomic clocks at the radio station.

Cardurnock

Cardurnock is a small settlement in Cumbria, England. It is by the coast, 20 kilometres (12 mi) west of Carlisle. The western extension of the Hadrian's Wall frontier defences once passed through the Cardurnock peninsula, though not the Wall itself. The sites of two small Roman fortlets, Milefortlet 4 and Milefortlet 5, have been located to the north and south of Cardurnock. It is adjacent to the Anthorn Radio Station.

Milefortlet 5

Milefortlet 5 (Cardurnock) was a Milefortlet of the Roman Cumbrian Coast defences. These milefortlets and intervening stone watchtowers extended from the western end of Hadrian's Wall, along the Cumbrian coast and were linked by a wooden palisade. They were contemporary with defensive structures on Hadrian's Wall. The remains of Milefortlet 5 was excavated in 1943-4 prior to its destruction in 1944.

Anthorn

Anthorn (pronounced AN-thorn) is a village in Cumbria, England. Historically in Cumberland, it is situated on the south side of the Solway Firth, on the Wampool estuary, about 13 miles (21 km) west of Carlisle. It is the location of the Anthorn radio station, broadcasting specialised low frequency signals for timekeeping and navigation.