Transmission Performance Report

On 1 April 2005 National Grid became the Great Britain System Operator (GBSO) in addition to its role as the Transmission Owner (TO) for England & Wales with the implementation of the British Electricity Transmission & Trading Arrangements (BETTA).

This required a transmission licence change. The new licence condition applicable to this report is now Standard Licence Condition C17 and now reports electricity transmission system performance for England, Wales and Scotland in terms of availability, system security and quality of service.

Transmission Performance Report

02 October 2013
GB Transmission System Performance Report 2012 - 2013
13 September 2012
GB Transmission System Performance Report: 2011 - 2012
04 October 2011
GB Transmission System Performance Report 2010 - 2011
Report to the Gas & Electricity Markets Authority
06 October 2010
GB Transmission System Performance Report: 2009 - 2010
Report to the Gas & Electricity Markets Authority
07 October 2009
GB Transmission System Performance Report: 2008 - 2009
Report to the Gas & Electricity Markets Authority
06 October 2008
GB Transmission System Performance Report: 2007 - 2008
Report to the Gas & Electricity Markets Authority
26 September 2007
GB Transmission System Performance Report: 2006 - 2007
Report to the Gas & Electricity Markets Authority
27 September 2006
Report to the Director of Ofgem on electricity system performance - 2005/06
This report reviews the performance for the financial year 2005-06 in these areas, specifically against the criteria agreed with OFGEM.
25 January 2006
2004/05
This report reviews the performance for the financial year 2004-05 in these areas, specifically against the criteria agreed with OFGEM.
10 November 2004
Report to the Director of Ofgem on electricity system performance - 2003/04
This report reviews the performance for the financial year 2003-04 in these areas, specifically against the criteria agreed with OFGEM.
 

Many of the files available to download on this page are Acrobat PDF files. To access these you will need Acrobat Reader which is available from the Adobe web site.