Notice

TA5 1UD, NNB Generation Company (HPC) Limited: environmental permit application advertisement - EPR/ZP3238FH/V004

Published 18 May 2026

Applies to England and Wales

Details of the application

The Environment Agency has received an application to vary an environmental permit under the Environmental Permitting (England and Wales) Regulations 2016 involving substantial change to a permit from NNB Generation Company (HPC) Limited.

Application number

EPR/ZP3238FH/V004

Regulated facility type

NNB Generation Company (HPC) Limited has applied to the Environment Agency for a variation to environmental permit EPR/ZP3238FH/V004. The Site is currently permitted for a combustion activity regulated under the Environmental Permitting (England and Wales) Regulations 2016. The existing permit includes a Schedule 1.1 Part A(1)(a) activity, namely the burning of fuel in an appliance with a rated thermal input of 50 megawatts or more. This permits the operation of standby diesel generators to provide back up electrical power at the Site in the event of a loss of off site power. Since the permit was originally granted in 2013, several design changes have been made. The proposed variation would allow the installation of additional back up generators and changes to those already permitted, to improve the resilience of the Site in the event of a loss of off site power. These changes would increase the combined total thermal input of the combustion plant to approximately 243 MWth, representing an increase of approximately 67 MWth compared to the previously permitted total. As part of the proposed variation, NNB Generation Company (HPC) Limited is also seeking to reduce the permitted operational hours for the back up generators to less than 500 hours per year. There is no change to the type of regulated activity permitted under the Environmental Permitting Regulations. In determining the application, the Environment Agency will assess whether the operator will use best available techniques (BAT) to prevent or, where that is not practicable, minimise emissions and impacts on people and the environment. A varied permit will only be issued if all relevant legislative and regulatory requirements are met.

Regulated facility address

Hinkley Point C
Near Bridgwater
Somerset
TA5 1UD

The application contains a description of how the proposed changes may affect:

• the installation
• the materials, substances and energy it will use and generate
• the conditions of its site
• the source, nature and quantity of its foreseeable emissions and their significant effects on the environment
• the proposed techniques for preventing, reducing, and monitoring its emissions and preventing and recovering waste
• and an outline of the main alternatives, if any, considered

How to view and comment on the application

If you have any comments on the application send these by 16 June 2026

You can comment:

Online: view and comment on the application using Citizen Space

Via email: pscpublicresponse@environment-agency.gov.uk

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

Read about our work regulating Hinkley Point https://www.gov.uk/guidance/hinkley-point-nuclear-regulation