Baseline changes for 2008/09 and 2007/08

The following material changes were made to the baseline for 2008/09 compared with 2007/08 and 2006/07.

There were no material changes in 2009/10.

Changes to 2008/09 baseline

Business	Reason for change	Change (tonnes)
ED&G (US)	First time inclusion of baseline for electricity generating facilities	Scope 1: 11,413,896
Gas distribution (UK)	Previous baseline for methane leakage and venting was for methane only. Updated to include carbon dioxide component of natural gas	Scope 1: 150,000
Transmission (UK)	Previous baseline for UK gas-powered compressors was for 2001/02. Baseline is now based on data for 1990/01	Scope 1: (920,152)
Gas Distribution (US)	First time inclusion of baseline for ex-KeySpan gas operations	Scope 1: 2,057,045
All operations	Inclusion of ex-KeySpan operational / non-operational energy use and transport	Scope 1: 325,256 Scope2: 37,977
	Change to 2008/09 baseline compared with 2007/08	Scope 1: 12,736,045 Scope 2: 37,977 Total: 12,774,022

Changes to 2007/08 baseline

Business	Reason for change	Change (tonnes)
Wireless (UK)	Business sold in 2007	Scope 1: (2,593) Scope 2: (66,636)
Advantica (UK)	Business sold in 2007	Scope 1: (934)
Gas distribution (US)	Methane leakage and venting attributable to Rhode Island gas added to baseline	Scope 1: 121,455
Tranmission (UK)	Correction of error in orginal baseline relating to electric powered compressors	Scope 1: (86,330)
	Change to 2007/08 baseline compared with 2006/07	Scope 1: 117,928 Scope 2: (152,966) Total: (35,038)

Figures in brackets are negative