Further to the cancellation advisory news item of 14 August 2009, please note that testing has been planned for the Prevailing View, Data Item Explorer, Report Explorer and Energy Flow Data sections of the National Grid website on the 10 October 2009.

This is as part of a programme of regular health checks. The purpose of these tests is to provide a level of assurance on system resiliency.

Internal testing will be carried out to provide seamless changes. However there may be occasions when users may experience mild disruption to some of the content within the Operational Data pages.

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