IP16 4UR, Sizewell C Limited, EPR/DB3147LF/V003: environmental permit application
Published 2 June 2026
Applies to England
© Crown copyright 2026
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Details of the application
The Environment Agency has received a permit variation application under the Environmental Permitting (England and Wales) Regulations 2016 from Sizewell C Limited.
Application number
EPR/DB3147LF/V003
Regulated facility type
Standalone flood risk activity permit (FRAP)
Regulated facility location
Sizewell C Main Development Site (Foreshore Zone)
Leiston
Suffolk
IP16 4UR
National grid reference point
TM 47598 63981 to TM 47572 63690
Receiving environment
Works within 16 metres of a sea defence (EA Asset ID No.178292).
Description of activity
This variation is required to allow the construction of rock armour bund on the seaward side of the Temporary Sea Defence (TSD).
The rock armour bund will extend for a length of approximately 340m from the southern end between the grid reference points detailed above.
The proposed rock armour will comprise predominantly of 3–6 tonne pieces of rock.
The crest level of the rock armour bund is set at 7.0 metres Above Ordnance Datum (mAOD) with a crest width of 2.65 metres.
The base of the rock armour bund will be excavated to a depth of 2.0 mAOD with a base width of 10.65 metres.
The rock armour will be sloped at a 1:2 gradient from the crest to base on the seaward side.
At the very southern end of the TSD the rock armour will tie in the Sizewell B Primary Bank (EA Asset ID No. 5831) via a shingle bund.
Works are expected to commence in August 2026 and take approximately 12-14 weeks to install, subject to weather. All construction activities will be undertaken using land-based machinery only.
How to view and comment on the application
Via e-mail: sizewellcnnb@environment-agency.gov.uk
Via telephone: 03708 506 506
If you have any comments on the application send these by 30 June 2026
For advice about how to make a representation or if you are unable to make a representation via e-mail please call 03708 506 506.
The Environment Agency will normally put any comments it receives on the public register. This includes your name but not your personal contact details. Please tell us if you do not want your response to be public.
The privacy notice for permit applicants/operators can be viewed at Privacy Notice