Carbon emissions

We're monitoring and reporting our operational emissions and are taking steps to reduce them as part of our plan to reach net zero by 2050.

Our operational and embedded carbon emissions

In 2024, our net location-based operational emissions were 229.9 kilotonnes of carbon dioxide equivalent (ktCO2e) (2023: 229.8 kTCO2e). This location-based approach uses the average grid emission factor for power from the electricity grid. Our market-based operational emissions were 281.2 ktCO2e (2023: 117.9 ktCO2e). This market-based approach uses the carbon intensity of the energy we procure from the electricity grid.

In 2024 our embedded emissions were 152.8 ktCO2e (2023: 198.1 ktCO2e). We continue to enhance our coverage of capital carbon emissions, working with our supply chain partners, and have improved the accuracy of our calculations for emissions from purchased goods and services, sourcing more appropriate carbon conversion factors.

Scope 1

Scope 2

Scope 3

Carbon emissions

This graph shows our operational and embedded carbon emissions and the different Scopes they fall in to. Operational emissions relate to the carbon emitted due to our day-to-day activities, so our use of energy, process and fugitive emissions, vehicle fleet and business travel, waste disposal and use of chemicals. Our embedded carbon emissions relate to our purchase of goods and services, and capital carbon – emissions from the manufacture, construction, and installation of our assets.

Operational GHG emissions

This graph shows the like-for-like greenhouse gas net operational emissions from 2015 to 2024. It excludes some sources of emissions, where reporting started in 2022/23, and then 2023/24 to allow a like for like comparison over this period. The additional sources of emissions reported in 23/24 but not included in the graph and mentioned above are disposal of waste, chemicals, transmission, and distribution (grid), purchased electricity (well to tank), and fuels (well to tank).

Carbon emissions

Scope 1

Scope 2

Scope 3

Operational GHG emissions

Performance against targets

We monitor our emissions performance against our interim carbon reduction target. Our gross Scope 1 and 2 emissions reduced by 0.1% against the same baseline year. Emissions in all Scope 1 categories (emissions from fuels, process and fugitive emissions, and emissions from transport) have increased slightly - this reflects a continued increase in operational demands. Electricity consumption has decreased (-8%) however this has been offset by an increase in the average UK grid emissions factor (+7%).

This year our reported operational net emissions Scopes 1, 2 and 3 have increased by 0.1% since our baseline year 2022–23. We are enhancing our understanding of our complete footprint for Scope 3, seeking to improve our coverage and calculation methodologies so that we are better placed to develop our 2050 decarbonisation plan and monitor performance against this.