Hinkley - Seabank

Hinkley - Seabank is a proposed new transmission project to allow for the safe connection of the planned Hinkley Point C nuclear power station. The project will also provide additional capability and relieve transmission constraints in the South West of England. 

In January 2016 the Secretary of State for Energy and Climate Change approved National Grid’s plans for the project. These plans can be found on National Grid’s website

Needs Case Assessment 

In 2017 we carried out a Strategic Wider Works (SWW) Final Needs Case Assessment to consider: 

  • Whether we think there is a technical need for the project as designed. 
  • Whether the project, or sections of it, should be delivered through an alternative delivery model. 

Our decision on the Needs Case for Hinkley - Seabank was published in January 2018.

In July 2018 we published our decision to fund delivery of the project through an alternative regulatory model.  

We will conduct a Project Assessment in 2018 which will determine the efficient costs that National Grid can recover from energy consumers for delivery of the project. 


Publications and updates

  • Published: 30th Jul 2018
  • Decisions
  • 2 Associated documents
This outlines our decision to apply the Competition Proxy model to National Grid Electricity Transmission’s Hinkley-Seabank connection project.

  • Published: 23rd Jan 2018
  • Closed: 20th Mar 2018
  • Consultations and responses
  • 20 Associated documents
This consultation sets out our minded-to position on the delivery model that should be used to fund NGET’s Hinkley – Seabank project.

  • Published: 23rd Jan 2018
  • Decisions
  • 2 Associated documents
This letter outlines our decision to approve the Final Needs Case for National Grid Electricity Transmission’s proposed Hinkley – Seabank connection project.

  • Published: 30th Aug 2017
  • Closed: 11th Oct 2017
  • Consultations and responses
  • 30 Associated documents
Consultation on our assessment of the Final Needs Case and potential delivery models for National Grid's Hinkley Seabank project.