GHG emission methodology
We have reported on all of the emission sources required under the Companies Act 2006 (Strategic Report and Directors’ Reports) Regulations 2013. We report our emissions data using a financial control approach meaning we include emissions from all parts of the business where we have the ability to direct financial and operating policies — this includes our owned and operated Retail stores and office space. Data has been prepared in accordance with the WRI/WBCSD GHG Protocol Corporate Accounting and Reporting Standard (revised edition), WRI/WBCSD GHG Protocol Scope 2 Guidance 2015 and emission factors from the DECC/DEFRA GHG Conversion Factors for Company Reporting 2018.
In addition, the guidance on the reporting of ‘Scope 2’ emissions allows us to demonstrate the reduced environmental impact of purchasing renewable electricity. This ‘market based method’ shows the emissions created using the precise mix of generating technologies used to supply our estate rather than simply taking a ‘grid average’ of all generating technologies, as is the case under the location based method. Emissions from Scope 2 electricity are therefore zero as 100% of our electricity is from renewable sources. We still report 149 tonnes of emissions in this category as these arise from the purchase of heating and cooling for certain stores.
Although we strive to ensure that our emission figures are accurate, access to the relevant data is not always possible and, therefore, some estimation is necessary. 14% of our emissions this year are based on estimated data.
The below graph demonstrates our improvement in emissions intensity over time:
Annual GHG emissions intensity (TCO2e/￡million revenue)