Gas Balancing Alertshttp://www.nationalgrid.com/uk/Gas/Data/GBA/Daily GBA and Storage Monitor Position Update - Daily GBA and Storage Monitor Position Reporthttp://www.nationalgrid.com/uk/Gas/Data/GBA/GBA_Info/DailyGBA1a.htmThis report provides data on Supply and Demand assumptions, and a daily declaration of the D-1 GBA Trigger Level. The report will be updated on a daily basis from 01/10/2009 to 31/03/2010.28 September 2009GBA and Storage Monitor Supporting Information - Safety Monitor Tabular 2009/10http://www.nationalgrid.com/uk/Gas/Data/GBA/gba_supportinginfo/SafetyMonitorRequirements200910.htm02 November 2009GBA and Storage Monitor Supporting Information - Daily GBA and Storage Monitor Position Report - Supporting Informationhttp://www.nationalgrid.com/uk/Gas/Data/GBA/gba_supportinginfo/gbaandsmreportinfo.htmThis document contains supporting information relevant to the Daily GBA and Storage Monitor position report. For further information about GBA methodology, please use the operational information link ...02 October 2009