In response to feedback from Market Participants National Grid has undertaken to re-publish the BMRA data - Initial Demand Outturn (INDO) in the form of 6 monthly linear files. Where INDO is for England and Wales (before 31st March 2005), the GB demand is also included and after this time, the England and Wales demand is included.
Real time data is available for system frequency and electricity demand. Demand data can be viewed over three separate time intervals: 60 minutes, 24 hours and the last 7 days. Frequency traces track movements over the last 60 minutes. The underlying data is available on the BMRS in a variety of formats.
System Operator Notification and Reporting System (SONAR)
SONAR is a web based bulletin board for the provision of near to real time data on information and actions taken outside the Balancing Mechanism with respect to system operation.