Users are advised that resilience testing has been planned for the Prevailing View, Data Item explorer, Report Explorer and the Energy Flow Data sections of the National Grid website on the 10 December 2011.

This is as part of a regular programme of checks to provide a level of assurance on system resilience.

Users may experience some disruption to the Operational Data pages between 10.30 - 15.00.

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