Consultation in the UK

A subsea electricity cable off the coast of the United Kingdom: your questions answered

RTE and EirGrid are running an information and public consultation process in the United Kingdom on the Celtic Interconnector project. As part of this you are invited to share your opinion and ask any question you may have on the project through this forum. Your question will be answered by the team within 72 hours and we will advise you by email once published online. This forum will be available from Tuesday 16 June to the Monday 13 July 2020. For comprehensive information on the project and the subsea electricity cable route off the coast of the United Kingdom please see the Celtic Interconnector PCI Brochure for UK stakeholders.


Your questions - Our answers

I am a global cable specialist supplier and was wondering if you could provide me information with regards the purchase of cable or tender for this project, your feedback is greatly appreciated.

By Mr. John Macken, Dublin , Ireland (June 19 2020)

Dear John,

Many thanks for your query. The public consultation is intended to increase public participation in the permit granting process and ensure an informed dialogue with the public regarding the project development. Given that your query is outside of the scope of the public consultation process it would be appreciated if you could direct your query directly to the team at and/or

Yours faithfully,

The Celtic Interconnector Project Team

How deep will the cables be buried and how will the excavation affect marine and aquatic life in the vicinity?

By Mr. Patrick O'MAHONY, Horsham, United Kingdom (June 19 2020)

Dear Patrick,

Many thanks for your question.

The depth of burial will vary depending on the geology of the seabed and any risk from fishing and shipping activity in the area of the submarine cable, where trawling and the dropping of anchors for example, can pose a risk.
Bearing this in mind, within United Kingdom (UK) Exclusive Economic Zone (EEZ) waters, the anticipated depths of burial will vary between approximately 0.5m and 2.5m.
It is anticipated that there may be some sections of the route where burial of the cable may be challenging due to the presence of more challenging seabed strata. In such areas where conventional burial tools fail to achieve the target burial depths, the cable may be laid on the seabed and protected by rock placement or secondary protection to ensure adequate protection of the submarine cable.
Rock placement will also be used to protect the submarine cable where it may need to cross over other existing subsea cables and pipelines.
The marine route was identified to ensure that no Environmentally Designated Areas or sites were crossed, in Ireland, France or in the UK EEZ however there will invariably be marine and aquatic life in the vicinity. EirGrid and RTE are committed to protecting and respecting the marine environment affected by the interconnector in all countries and will consult with all relevant authorities and stakeholders.
All relevant legislation will be complied with including the requirements of the UK’s Marine and Coastal Access Act 2009 and the Habitats and Species Regulations 2017.

Yours faithfully,
The Celtic Interconnector Project Team

Ask your question

RTE and EirGrid process the data collected during the consultation in the UK. To find out more about the management of your personal data, please see the “Data protection policy“.

To find out more about the consultation
in France and in Ireland

Do you have a question or an observation?
Contact us