Deeside Power (UK) Limited - Deeside Power Station, Weighbridge Road, Deeside Industrial Park, Deeside, Flintshire, CH5 2UL

We’ve received an application to vary an environmental permit from Deeside Power (UK) Limited

Substantial variation application for an environmental permit under the Environmental Permitting (England and Wales) Regulations 2016

Application number: PAN-028461
Regulated facility type: Installation - Section 1.1: Combustion activities - Part A (1)(a) Burning any fuel in an appliance with a thermal input of 50 or more megawatts
Regulated facility location: Deeside Power Station, Weighbridge Road, Deeside Industrial Park, Deeside, Flintshire, CH5 2UL

This application is add 11no. natural gas-fired reciprocating engines to the permit. The purpose of the engines is to generate electricity for supply to the National Grid. The net rated thermal input of each engine is 9.91MW and the combined aggregated thermal input is 109MW. The engines will operate for an average of 1500 hours per year as a five-year rolling average, with a maximum of 2000 hours per year in any one of those five years. The engines will be used to generate electricity at times of increased power demand on, or reduced power supply to, the National Grid.

The Installation is already permitted to operate as a Combined Cycle Gas Turbine (CCGT) power station. There are two CCGTs at the Installation. However, they have ceased operation as a fossil-fuel electricity generation activity and have been converted into synchronous compensators which do not burn any fuel and provide reactive power to the National Grid. If granted, the CCGTs, and associated controls, will be removed from the permit as part of this variation.

The application contains a description of the proposed 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 potential impact, 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

You can see the application documents free of charge, from our online public register. Or you can request a copy of the information from us. This may take time to process and there could be a charge.

If you have any comments send these by 07 January 2026

Email: permittingconsultations@naturalresourceswales.gov.uk

Or write to:

Permitting Service
Natural Resources Wales
Crown Buildings
Cathays Park
Cardiff
CF10 3NQ

We must decide whether to grant or refuse the application. If we grant it, we must decide what conditions to include in the permit. You can find information about how we make decisions in our Public Participation Statement.