Since September 2008 there have been three upgrades of the online state pension forecasting service.
To implement these upgrades, the online service was unavailable as follows:
From 00.00 on 24 October 2008 to 07:00 on 27 October 2008
From 17:00 on 23 January 2009 to 07:00 on 26 January 2009
From 19:00 on 3 April 2009 to 01:00 on 4 April 2009
Times are given using the 24 hour clock.