Certificate additionality

The GGCS maintains a conservative approach to any additionality claims that should be made related to gas consumers purchasing Green Gas Certificates.

A Green Gas Certificate guarantees that;

  • for the quantity (kWh) of Renewable Gas Guarantees of Origin (RGGOs) listed on a Certificate, that amount of green gas was injected into the grid by the producer named on the Certificate;
  • and that having been retired against the gas consumption of the consumer named on the Certificate, those RGGOs have not, and cannot at any point the future, be sold to any other consumer.

Consumers can check that their GGCS Certificate is genuine here:

The production of green gas in the UK is financially supported by either the Renewable Heat Incentive (RHI) or the Renewable Transport Fuel Obligation (RTFO).

In that respect no additional green gas can be said to have been directly produced as a result of a gas consumer buying a Green Gas Certificate, and it is important consumers don’t make any such claims. However demand for Certificates “does create an important driver for further growth of green gas production in the UK.” (Ecofys, 2016)

Founder Partners and Associate Members:
British Gas
Thames Water
Milton Keynes Council
National Grid
CNG Services Ltd