2017 GHG reporting conversion factors released

News – Friday, September 15th, 2017


Last month BEIS released carbon conversion factors for 2017, read on the main changes and how to use these in reporting.
The 2017 Government Greenhouse Gas Conversion Factors for Company Reporting are the current official set of UK government emissions factors. They are valid from the end of August 2017 for one year. The methodology for determining carbon dioxide equivalents (CO2e) remains the same year on year except where changes are outlined.

There are a number of additions and changes in 2017. The main changes are below

No change in the methodology, however, the conversion factor has decreased by almost 15% representing the decarbonisation of the main UK grid. You can see the trend below:

Year Conversion factor – Kg CO2e Percentage change

  • 2011  – 0.45205
  • 2012  – 0.46002 (2%)
  • 2013 –  0.44548 (3%)
  • 2014 –  0.49426 (11%)
  • 2015 –  0.46219 (6.5%)
  • 2016 – 0.41205 (10.84%)
  • 2017 – 0.35156 (14.68%)

Addition of factor for Electric vehicles
A number of emission factors for plug in electric vehicles, for electric cars and vans, has been provided to cover the different emission components/scope.

Addition of factor for Overnight hotel stay
A number of factors which can be used to report emissions associated with an overnight hotel stay have been added, which complement the existing emission factors for business travel that are already available. These new emission factors are based on estimates for an overnight stay in an average hotel, and different emission factors provided for a range of countries on a ‘room per night’ basis.

Well-to-tank data source change
The methodological source for WTT emission factors for a range of different transport fuels (including petrol, diesel, kerosene and natural gas/CNG/LNG) has been updated.

Amendment to road fuel factor
Previously separate emission factors have been provided for pure fossil-based petrol and diesel road transport fuels, pure biofuels, and also emission factors that account for the average share of biofuel blended with these fuels in public refuelling stations. The methodologies used to calculate vehicle emission factors have previously been based on pure conventional fossil-based road transport fuels.

The share of biofuels has been increasing for some years now, and therefore this year the methodologies used to develop the road vehicle emission factors (both direct CO2 and WTT) have been modified to account for the average petrol and diesel biofuel blend in public refuelling stations.

Refer to the BEIS methodology paper here for more information.

If you are a business in or outside of Camden and would like assistance with your carbon footprint get in touch: camdencca@camden.gov.uk