Suffolk - Non Material Changes To Sizewell C Development Consent Order

SIZEWELL C LIMITED

Section 153 Of The Planning Act 2008 And Regulation 6 Of The Infrastructure Planning (Changes To, And Revocation Of, Development Consent Orders) Regulations 2011 - Notice Of Application To Make A Non-Material Change To The Following Development Consent Order:

The Sizewell C (Nuclear Generating Station) Order 2022 (SI 2022/853)

Notice is hereby given that an application has been made by Sizewell C Limited (company number 09284825) of registered office 25 Copthall Avenue, London, England, EC2R 7BP (the "Applicant") to the Secretary of State for Energy Security and Net Zero to make a non-material change to The Sizewell C (Nuclear Generating Station) Order 2022 (the "Order") under the Planning Act 2008 (the "NMC Application").

The Order includes provision authorising the construction, operation, maintenance and decommissioning of the Sizewell C nuclear power station, comprising two United Kingdom European Pressurised Reactor units located adjacent to the existing Sizewell B power station on the Suffolk coast, together with all supporting infrastructure required for its delivery. The Applicant seeks to make eight non-material changes (the "NMCs") to the Order.

Change 1 – Use Of Part Of The Land East Of Eastlands Industrial Estate As An Integrated Reinforcement Yard
At the time of the grant of the Order it was envisaged that part of the Land East of Eastlands Industrial Estate ("LEEIE"), an area to the south-west of the main development site and north-east of Leiston, would be used as a temporary caravan park during construction.

The Applicant now proposes to use this area instead as an Integrated Reinforcement Yard, where steel reinforcement bars would be cut, bent and assembled for use in constructing the power station. This change would reduce heavy goods vehicle movements by enabling fabrication close to the point of use rather than transporting prefabricated steel from offsite. This use remains temporary and construction-related, and the land will be restored following the completion of construction.

Change 2 – Simultaneous Use Of Rail Facilities At The LEEIE And The Temporary Construction Area
At the time of the grant of the Order it was assumed that reliance on the LEEIE railhead would reduce once the Temporary Construction Area railhead became operational.

The Applicant now proposes for both railheads to be used concurrently, providing greater flexibility in construction logistics and maximising the use of rail transport for construction materials. Controls on hours of operation, train numbers and noise mitigation measures will be maintained.

Change 3 – Greater Flexibility In The Siting Of The Intermediate Level Waste Store
The Order and its control documents currently restrict the Intermediate Level Waste Store to a specific zone within the main development site. Further design work has identified that a store of sufficient capacity cannot be efficiently accommodated within that zone.

The Applicant proposes to expand the permitted zone to allow the store to be repositioned, while maintaining the same maximum building height and operational function.

Change 4 – Amendments To Public Rights Of Way Associated With The Sizewell Link Road, Two Village Bypass And Main Development Site
The Applicant proposes amendments to the certified Rights of Way Plans and consequential amendments to the Order to align public rights of way stopping-up and diversion extents with the detailed highway designs; correct omissions and inaccuracies between the certified plans and schedules of the Order; and authorise new public rights of way running alongside the Sizewell Link Road and Two Village Bypass.

Change 5 – Clarification Of Process For Approved Departures From Certified Control Documents
The Applicant proposes a minor clarification to the Order to confirm that where a discharging authority (such as the local planning authority) approves a departure from a certified control document under the requirements in the Order, it may do so by approving an updated version of that document. This does not alter the scope of the discharging authority’s existing powers or reduce regulatory oversight.

Change 6 – Refinement Of The Traffic Regulation Order Power
The Applicant proposes to amend the Order to clarify its ability to propose amendments to existing Traffic Regulation Orders in connection with the delivery of the authorised development. Any such amendments will remain subject to the consent of the relevant traffic authority. The change is intended to alleviate the administrative burden on the local traffic authority.

Change 7 – Ensuring That Variations To The Deemed Marine Licence Have Effect Without A Parallel Change To The Order
The Applicant proposes to remove a cross-reference in the Order to the Works Plans for marine works, so that variations granted by the Marine Management Organisation ("MMO") to the Deemed Marine Licence that amend the location of works in the marine environment take effect without also requiring a separate application to the Secretary of State to amend the Order. The Deemed Marine Licence and the MMO will continue to regulate the location of the marine works.

Change 8 – Correction Of Minor Drafting Errors
The Applicant proposes to correct minor drafting errors and omissions in the Order that have been identified since it was granted.

Overall
The NMCs proposed are necessary for the reasons set out above. None of the NMCs will give rise to any new or materially different likely significant environmental effects to those originally assessed as part of the application for the Order, nor do they require additional compulsory acquisition of land, nor do they have new or different effects on local residents or businesses or any additional implications in respect of habitats regulations assessment. The Applicant therefore considers that the proposed changes are non-material in nature.

A copy of the NMC Application and its accompanying documents are available for inspection, free of charge, via the Planning Inspectorate’s website at the below address until at least the end of the consultation period referred to below:
https://national-infrastructureconsenting.planninginspectorate.gov.uk/projects/EN010012

If you require a hard copy of the NMC Application and its accompanying documents (for example because you do not have access to a computer and are unable to view the documents on the Planning Inspectorate’s website) or have related enquiries, you can contact the Applicant at: info@sizewellc.com, or on: 08001976102. Hard copies are available at no cost.

Any representation about the NMC Application must be made by email to: sizewellc@planninginspectorate.gov.uk, or in writing to: National Infrastructure Planning, the Planning Inspectorate, Temple Quay House, 2 The Square, Bristol, BS1 6PN.

Please quote reference EN010012 on any correspondence. Consultation responses will be published on the relevant project page of the National Infrastructure Planning website.

Please note that representations must be received by the Planning Inspectorate by 11:59pm on 24 June 2026.

SIZEWELL C LIMITED
Dated: 20th May 2026