Business carbon footprint: Gas transmission (RIIO-T1)


Javascript is required to render chart Business carbon footprint: Gas transmission (RIIO-T1).

Source: RIIO gas transmission annual report 2017-18.

Information correct as of: December 2018

This chart is an indicator of environmental impact. It shows National Grid Gas Transmission’s business carbon footprint for emissions in tonnes of carbon dioxide equivalent (tCO2e) for the five completed years of the RIIO-T1 price control. Click on Scopes 1 and 2 in the chart legend to view the column data for Scope 3.

We update this chart on an annual basis. Click the ‘more information’ tab above for a summary of the latest trends, details of how to interpret the figures and for information on methodology.

Policy Areas:

  • Gas - transmission

Data Table

Business carbon footprint: Gas transmission (RIIO-T1)
YearScope 1Scope 2Scope 3

More information

Business carbon footprint: At-a-glance summary

There has been a general increase in emissions figures during 2017-18 with a slight decrease for Scope 2 emissions.

Relevance and further information

National Grid Gas Transmission reports annually on their business carbon footprint to allow interested stakeholders to monitor its performance. There are no financial incentives linked to this output.

The business carbon footprint measure includes:

  • Scope 1 - emissions directly related to the day-to-day business activities of network business.
  • Scope 2 - emissions which arise from operating the network, including the CO2 emissions from losses of electricity or shrinkage of gas that occur as a result of transporting energy on the network.
  • Scope 3 - emissions due to third party contractors carrying out business activities on behalf of the network.

Emissions from natural gas fuel combustion to run gas-powered compressor units are included in the Scope 1 emissions figures. 


Each year, network companies must report on their performance under the RIIO-T1 price control. Our review of their submissions and supporting information informs our annual publications on network company performance.

Date correct
December 2018
Policy area