Please note that due to essential maintenance work being carried out, users may witness a short delay in the publication of some of the Energy & Capacity data items published on the National Grid website.

The work is scheduled during the times listed below:

Saturday, 09 July 2011: 06:00am - 11:15am 

Sunday,   10 July 2011: 06:00am - 11:00am

We apologise for any inconvenience this may cause and we will keep you informed of any changes to the above programme.