NPL Time Signal Transmitter
The UK's Most Accurate Time
A scheduled maintenance shutdown of the MSF service to allow safe working on the masts and antennas will take place on 9 September 2021.
The service will be off-air from:
10:00 to 14:00 BST
If the weather is unsuitable for work to be carried out, then the service will not be turned off.
The MSF radio signal is a dedicated time broadcast that provides an accurate and reliable source of UK civil time, based on the NPL time scale UTC (NPL).
The MSF radio signal is a dedicated standard frequency and time broadcast that provides an accurate and reliable source of UK civil time. It is available 24 hours a day across the whole of the UK and beyond.
The signal operates on a frequency of 60kHz and carries a time and date code that can be received and decoded by a wide range of readily available radio-controlled clocks.