Development Consent Order

Large projects such as Wylfa Newydd are known as Nationally Significant Infrastructure Projects (NSIPs). They require a Development Consent Order (DCO) application that is determined by UK Government. Horizon has applied for a DCO from the UK Secretary of State for Business, Energy and Industrial Strategy.

The DCO process is managed by the Planning Inspectorate (rather than the local council which considers traditional planning applications), and provides opportunities for stakeholders to comment on the application.

Visit the Planning Inspectorate’s website for more information about its process.

Viewing our application

You can view our DCO application documents here on the Planning Inspectorate’s website.

To help you navigate your way through our DCO application for Wylfa Newydd, we’ve created a guide which you can download below. It sets out the structure of the documents so you can find the information you are interested in.

‘Navigating our Development Consent Order application’ booklet

Download 1mb PDF (also available in Welsh)

In accordance with our Welsh Language Policy, most of our technical documents are available in English only. Documents or sections that are also available in Welsh are predominantly the summaries of key documents, the non-technical summaries and the Welsh Language Impact Assessment. These are indicated in the guide.


Using our 3D computer model of Wylfa Newydd, we have produced a series of short videos so you can see what the different aspects of the Project could look like once built.

Please note: all videos show indicative images only.

Click play on any of the videos below to start watching:


Main Site

Logistics Center


Park & Ride

The Site Campus


Llanfaethlu Bypass

Cefn Coch Bypass


Llanfachraeth Bypass

Emergency Control Centre

Essential Off-Site Facilities