Cemlyn - Trouble on the Horizon

We need your help to protect Cemlyn Nature Reserve and the international and nationally important wildlife of the north Anglesey coast from damaging nuclear power station proposals.

Through the winter of 2016 the Wildlife Trust indicated our objections to Horizon about how they were then proposing to develop the Wylfa site. We now have a further opportunity to comment on the proposed nuclear power station development and would like you, our members and supporters, to join our voice.

We recognise the need to reduce greenhouse gas emissions, to tackle climate change and increase energy generation from non-carbon based sources. However, if this proposal were to go ahead, it is critical that it is built to the highest environmental standards and with minimal impacts to the coast of north Anglesey and its iconic wildlife. Currently, NWWT do not belief that this will be the case.

If Wylfa Newydd is approved and without delays, it will take another 10 years to build, covering an area the size of Cemaes. Even before the power station receives permission it is anticipated that in the next 12 months this area will be stripped of all above ground features (ie walls, cloddiau, fences) and cleared of vegetation (eg trees and hedgerows).

A development of such enormous scale cannot avoid impacts to wildlife and there are many reasons to object to its construction. These include:

  • Works taking place within 110m of the internationally designated Cemlyn Nature Reserve and subsequent impacts to the breeding tern colony: the only Welsh site where Sandwich terns breed.
  • Tre’r Gof SSSI fen being surrounded by construction and directly receiving the development’s drainage
  • Direct loss of habitat for many species, some internationally protected, including water vole, otter, great crested newt, European eel, Red Data Book mud-snails, chough, adder, brown hare, red squirrel and hedgehog
  • Unknown impacts on the marine environment and coastal processes by the construction of a new harbour and harbour wall (breakwaters).

If you care about Cemlyn and the wildlife of north Anglesey, please act now :

Isle of Anglesey County Council have issued a consultation on another stage in the proposal for a new nuclear power station at Wylfa. Please support us by making your views known on the planning application for Site Clearance. You can visit the Council’s offices at Llangefni Business Centre or local libraries at Llangefni, Cemaes or Amlwch to view the application (38C310F/EIA/ECON) or download the application documents (see link below); you have until 2nd December to make your commentsPlease send them to StevenOwen@ynysmon.gov.uk. (The Wildlife Trust’s comments are available via the download link below and should be read in conjunction with our response to the earlier pre-planning consultation.)

We are currently concerned about Wylfa Head Local Nature Reserve. The Wildlife Trust and other organisations have recently received a letter of reassurance from Isle of Anglesey County Council who have sought legal advice over the status of Wylfa Head Local Nature Reserve (LNR) following challenges from Horizon. The letter reassures stakeholders that the Council will be taking full account of the value of Wylfa Head when determining the Site Preparation & Clearance application. Your support is needed to demonstrate the value of local wildlife to you. The Wildlife Trust question if Horizon’s challenges are the action of a considerate and responsible developer, or a sign of Horizon’s attempt to try to diminish and override local policy to ease the progress of their development proposals for the nuclear power station. Horizon challenged the LNR designation at the Joint Local Development Plan by citing a problem at the time of the sale of the land, alongside objecting to the Council’s Policy on Wildlife Sites. The Council have made it clear that whilst they had to concede the LNR designation of Wylfa Head, that the wildlife (Wildlife Site designation), public amenity and landscape of Wylfa Head are important considerations when they determine the planning application. Wylfa Head is immediately adjacent to the proposed Site Campus, which will be cleared to form accommodation for 4,000 temporary workers. The Wildlife Trust have previously objected to the premature clearance of this location for development due to its proximity to important wildlife, which includes Wylfa Head but also a nationally designated Site of Special Scientific Interest at Tre’r Gof.


Find out more:

  • Why Wylfa was chosen as a site for a new nuclear power station (click here for National Policy Statement for Nuclear Power Generation (EN-6))
  • Ecological Options paper – you can download the summary or full report below.

    A tripartite group of wildlife NGOs has formed between the National Trust, North Wales Wildlife Trust and the RSPB, which has prepared this paper following increasing and significant concerns along with disappointment about progress by Horizon in relation to ecological options (avoidance, mitigation and compensation) for the Wylfa Newydd proposal.

Thank you!
We are extremely grateful to players of People’s Postcode Lottery, whose financial support has allowed us to appoint a Biodiversity Planning Consultant to represent the Wildlife Trust. We also value the contribution to this work made by several volunteers, with expert knowledge of Cemlyn and its wildlife.




FilenameFile size
north_wales_wildilfe_trust_response_38c310f-eia-econ.pdf493.66 KB
earlier pre-planning consultation_nwwt_sectn61z_spc_2017_final.pdf770.44 KB
NWWT_press_release_wylfa_june2017.pdf320.61 KB
ecological_options_Full_report_may_2017.pdf965.48 KB
ecological_options_Summary_may_2017.pdf518.67 KB