National Physical Laboratory

MSF Outages

MSF Scheduled Maintenance Periods

The MSF 60 kHz standard-frequency and time signal, broadcast by Babcock on behalf of NPL, is occasionally taken off-air to allow maintenance work on the masts and antennas at Anthorn Radio Station to be carried out in safety. This means that your radio-controlled clock will not be picking up the MSF signal, so may not be working correctly.

Annual maintenance: 14 – 31 August 2017

The annual maintenance shutdown of the MSF service to allow safe maintenance of the masts and antennas, including greasing of the stays, will take place between 14 August and 31 August 2017. The service will be off-air from 08:00 to 19:00 BST each day, including weekends. If the weather is unsuitable for work to be carried out, then the service will not be turned off. If the work is completed sooner than 19:00 BST on any day, the service will be restored as soon as possible.

The dates and times of the forthcoming scheduled maintenance periods are as follows:


  • 14 September 2017 from 10:00 to 14:00

  • 14 December 2017 from 10:00 to 14:00

The shutdowns will take place between 10:00 and 14:00 UTC in December and March, and between 10:00 and 14:00 BST in June and September.

The duration of each outage period will be kept to a minimum, and the signal may be back on-air prior to the times given above.

In addition to these dates, the signal is likely to be taken off-air for a two-day period during spring or summer each year, remaining off-air overnight. The dates of this longer outage will be announced on this page and by e-mailed notices to registered users as soon as they are known.

If you wish to be kept informed about planned outages, please complete and submit the E-mailed Notifications of Scheduled Maintenance Periods form.

Find out more about the MSF Radio Time Signal

Some common problems with radio-controlled clocks


Last Updated: 25 Jul 2017
Created: 28 Jul 2010


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