Due to essential work on the system there is a possibility that that the above reports may show some incorrect data on Monday 15th and Tuesday 16th December.  We will constantly monitor the data published over these 2 days and will issue any corrections to the data to the ANS box within the Prevailing View screen as appropriate.  Any short term corrections we issue will be datafixed over the following few days and will be reflected in the historical data archive.

We apologise for any inconvenience this may cause but appreciate your understanding at this time.