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BFF Blog
BFF uncovers errors in latest Defra GHG factors
Tue 28 Jul 2009
BFF have today written to their clients and informed DEFRA and DECC of errors in the recently published Government’s GHG Conversion Factors which are widely used by businesses to measure, manage and report their greenhouse gas emissions. The errors affect the conversion factors for biofuels and aviation. BFF have also raised several other data and methodology concerns and queries with DEFRA/DECC and are awaiting responses.
Initial finding are posted below. A full report will be published once the other outstanding issues are resolved and BFF’s review is complete. BFF’s initial review of the June 2009 Conversion Factors revealed the following errors:
- Annex 6: Air passenger travel, all factors: the total GHG is less than total CO2. This is because the GHG formula fails to uplift by the 109% distance assumption. [Now Fixed]
- Annex 6: Air passenger travel, domestic: the total CO2 cell has no formula. [Now Fixed]
- Annex 9: Biofuels emission factors are calculated, but the formulas refer to incorrect fuel properties (Annex 11).
BFF have also raised other concerns including inconsistencies between the way in which overseas and domestic electricity is accounted (Annex 10) and the materials life-cycle conversion factors (Annex 9).
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