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.

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

  • 11 September 2014 from 10:00 BST to 14:00 BST
  • 11 December 2014 from 10:00 UTC to 14:00 UTC
  • 12 March 2015 from 10:00 UTC to 14:00 UTC
  • 11 June 2015 from 10:00 BST to 14:00 BST
  • 10 September 2015 from 10:00 BST to 14:00 BST
  • 10 December 2015 from 10:00 UTC to 14:00 UTC

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 July or August 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.


Unscheduled Breaks in the Service

Short unscheduled breaks in transmission occur occasionally in addition to the scheduled breaks for maintenance. NPL provides a recorded message service (Tel +44 20 8943 6493), which announces planned maintenance periods and, during working hours, prolonged unscheduled outages.


Find out more about the MSF Radio Time Signal

Some common problems with radio-controlled clocks

Contact: communications@npl.co.uk

Last Updated: 16 Jun 2014
Created: 28 Jul 2010