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UK ETS scope expansion: maritime sector

The UK ETS Authority is seeking input on proposals for expanding the UK Emissions Trading Scheme to the maritime sector.

Last fetched 03 May 2026 · gov.uk
Detail

The UK Emissions Trading Scheme (UK ETS) Authority (UK Government, Scottish Government, Welsh Government and the Department of Agriculture, Environment and Rural Affairs for Northern Ireland) is seeking input on a number of proposals to expand the scheme to the maritime sector.

We envisage that including maritime within the UK ETS can help overcome a key barrier to decarbonising the sector, which is that the prices of maritime fuels currently do not reflect their environmental costs. Including the maritime sector within the scheme could also strengthen the incentive to adopt low carbon fuels, and support deployment of fuel-efficient technologies and the introduction of fuel-efficient operating practices.     

The purpose of this consultation is to provide more detail and consult on the implementation of how maritime will be incorporated in the scheme from 2026 and to propose and consult on potential future expansion of the UK ETS to additional maritime emissions. In particular, it seeks views on:   

  • the scope of the scheme (definition of a domestic voyage, thresholds for inclusion, the inclusion of methane and nitrous oxide emissions and exemptions from the scheme)  
  • details around how to adjust the UK ETS cap to include emissions from the maritime sector  
  • participating in the scheme (regulatory regime and operator requirements, monitoring, reporting and verification, point of obligation and guidance)  
  • impacts of the scheme (decarbonisation impacts, potential distributional impacts and carbon leakage risk; equality considerations)
  • potential future expansion of the UK ETS to additional maritime emissions, with a future review of the threshold and coverage of international routes

This consultation is open to anyone, but we expect it to be of greatest interest to:  

  • the shipping industry  
  • non-governmental organisations (NGOs)  
  • academics and thinktanks  
  • any individual or organisation that has an interest, directly or indirectly in the expansion of the UK ETS and/or the adjustment to the cap of the scheme

Read our consultation privacy notice.

Documents
UK Emissions Trading Scheme scope expansion: maritimeapplication/pdfUK Emissions Trading Scheme scope expansion: maritime (HTML)UK Emissions Trading Scheme scope expansion: maritime - analytical annexapplication/pdfUK Emissions Trading Scheme scope expansion: maritime - analytical annex (HTML)Ymestyn Cwmpas Cynllun Masnachu Allyriadau’r DU: Morwrol application/pdfYmestyn Cwmpas Cynllun Masnachu Allyriadau’r DU: Morwrol (HTML)Atodiad dadansoddol i ymestyn cwmpas Cynllun Masnachu Allyriadau’r DU (CMA): Morwrol application/pdfAtodiad dadansoddol i ymestyn cwmpas Cynllun Masnachu Allyriadau’r DU (CMA): Morwrol (HTML)UK ETS scope expansion: domestic maritime - main Authority response (published November 2025)application/pdfUK ETS scope expansion: domestic maritime - main Authority response (accessible webpage)UK ETS scope expansion: domestic maritime - final stage impact assessmentapplication/pdfCynllun Masnachu Allyriadau'r DU: Prif ymateb yr Awdurdod i Ehangu Cwmpas: Ymgynghoriad morolapplication/pdfCynllun Masnachu Allyriadau'r DU: Prif ymateb yr Awdurdod i Ehangu Cwmpas: Ymgynghoriad morolEhangu Cwmpas Cynllun Masnachu Allyriadau'r DU - Morol domestigapplication/pdfUK ETS scope expansion: domestic maritime - interim response (published July 2025)application/pdfUK ETS scope expansion: domestic maritime interim response - analytical annex (published July 2025)application/pdfEhangu cwmpas Cynllun Masnachu Allyriadau’r DU: Morwrol – Ymateb interimapplication/pdfAtodiad dadansoddol i ehangu cwmpas Cynllun Masnachu Allyriadau’r DU (CMA): Morwrol – ymateb interimapplication/pdf
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