Supporting the Mona Offshore Wind Project to reach consent

10 July 2025

The Mona Offshore Wind Project is expected to have a potential generating capacity of 1.5 GW. In 2021, our team was selected by the consortium of bp Alternative Energy Investments and Energie Baden-Württemberg AG to lead the Environmental Impact Assessment (EIA) and Habitats Regulations Assessment (HRA) for the development of their offshore wind lease areas in the Irish Sea, which include Mona.
 
The Secretary of State has now granted development consent for the Mona Offshore Wind Project. Mona was the first of the projects in the UK’s Round 4 leasing round to be accepted for examination and the first of those projects to be granted consent. It has also gone from lease award to consent faster than any other UK offshore wind farm.

Tetra Tech RPS Energy prepared the EIA Scoping Report (published in 2022), the Preliminary Environmental Information Report (published in 2023), and the Environmental Statement and HRA submitted as part of the project’s Development Consent Order application in early 2024. The application was subsequently accepted for examination by the Planning Inspectorate. During the examination phase, Tetra Tech RPS Energy led on the EIA and HRA, including providing subject matter expertise, authoring documents and leading on stakeholder consultation across a range of onshore and offshore technical topics. The examination phase ran from July 2024 to January 2025.

Due to its location offshore Wales, the Mona Offshore Wind Project also required a Marine Licence from the Natural Resources Wales Marine Licensing Team (NRW MLT). This separate consenting process is ongoing and Tetra Tech RPS Energy are continuing to support Mona Offshore Wind Ltd with this work.

Emily King, Senior Associate Director at Tetra Tech RPS Energy and Project Director for the Mona EIA and HRA, commented:

“We are proud to have worked alongside the Mona development team, and in close collaboration with the project’s key stakeholders, to obtain Development Consent for this project. Our specialist team has worked diligently to ensure that potential environmental impacts are thoroughly assessed and mitigated – supporting our client in the sustainable development of this major UK offshore wind project.”

Tetra Tech RPS Energy is also supporting:

• The proposed 2.9 GW bp and EnBW Morven Offshore Wind Farm Projects
  
  
• The proposed 1.5 GW bp and EnBW Morgan Offshore Wind Project: Generation Assets, which is the sister project of Mona
  
  
• The Morgan and Morecambe Offshore Wind Farms Transmission Assets, which will connect the Morgan Offshore Wind Project: Generation Assets and the Morecambe Offshore Wind Farm: Generation Assets to the National Grid.