Our Scope 1 and 2 greenhouse gas emissions are reported in line with the WRI/WBCSD Greenhouse Gas Protocol Corporate Standard for all six Kyoto gases and using the operational control approach for emissions accounting.
Prior to 2012/13, we reported greenhouse gas emissions attributable to electricity transmission line losses as a Scope 3 emission. On the advice of our GHG emission data verifier, we have now reclassified this emission source as Scope 2.
Our Scope 1 and 2 emission reduction targets exclude line losses, so we report our Scope 1 and 2 emission both including and excluding this emission source.
These Scope 1 and 2 emissions are independently assured against the international standard ISO14064-3 Greenhouse Gas Assurance Protocol.
Emissions reduction against 1990 baseline
Our total Scope 1 and 2 emissions (excluding line losses)
for 2015/16 were around 7.3 million tonnes carbon dioxide equivalent. This
represents a 62% reduction on our 1990 base line.
Our total Scope 1 and 2 emissions (including line losses)
were around 10.7 million tonnes carbon dioxide equivalent (2014/15: 11.3
*The value of 7.3 million tonnes is correct. The value of
62% does not represent the percentage reduction of this 7.3 million tonnes and
should read 63%
We also measure our carbon intensity. For 2015/16 excluding line losses this was 496 tonnes carbon dioxide equivalent per £ million of
revenue compared with 478 tonnes in 2014/15.