In France, the category of the GridLink project requires a referral to the National Commission for Public Debate (CNDP) to determine the public consultation procedures. The referral was made by GridLink in July 2017 and the CNDP required a preliminary consultation and appointed a guarantor to oversee the process.

The CNDP appointed a new guarantor in 4 September 2019 who will oversee and report on the public consultation before the public inquiry during the Environmental Authorisation procedure. This report will be made public and attached to the public inquiry file.

The guarantor may be contacted at the e-mail address below:

Laurent Demolins:

Concept for Public Participation

Approach to Public Consultation

To explain the approach to public consultations about the GridLink project, including to implement the recommendations from the preliminary consultation in France, we have prepared a Concept for Public Participation setting out the planned approach to stakeholder engagement with the local communities, interest groups and the general public. 

Prior Consultation in France

Preliminary consultation

Public consultations are a key part of our commitment to engaging positively with all stakeholders throughout the development, construction and operation of the GridLink project in France.


Public consultations are a key part of our commitment to engaging positively with all stakeholders throughout the development, construction and operation of the GridLink project in France.

Calendar of public consultations and next steps in France

GridLink launched its website to provide public information in November 2017.

Since that time, there has been regular contact with the key stakeholders affected by the project activities, for example the Grand Port Maritime de Dunkerque, chamber of agriculture and professional fishermen.

Public consultations are planned at key moments to inform the public about the progress of environmental studies and the project design. The calendar of public consultations is summarised below: ​

  • Application for environmental authorization
  • Applications for maritime public area utilization rights
  • Wednesday 14th October: Public meeting from 18:30 to 20:30 at Loon-Plage town hall
  • Wednesday 7th October: Public meeting from 18:30 to 20:30 at Bourbourg town hall
  • Wednesday 23rd September: Launch of the virtual exhibition on the GridLink web-site
  • Thematic meetings with interest groups
  • Preparation of the Environmental Impact Assessment report
  • Detailed environmental studies
  • Definition of measures to avoid, reduce and mitigate environmental impacts
  • Public meeting at Bourbourg
  • Public meeting at Loon-Plage
  • Thematic meetings
  • Information points and delivery of flyers to local communities
  • Thematic meetings
  • Environmental baseline studies (ecology, noise, pedology, fisheries)
  • Subsea geophysical and geotechnical survey
  • Onshore topographic, geophysical and geotechnical survey
  • Public meeting at Bourbourg
  • Public meeting at Loon-Plage
  • Thematic meetings
  • Information points


In September 2019, we started the preparation of the Environmental Impact Assessment and permit applications in the UK. Therefore, a wider public consultation programme also started at this time, which expanded the consultations to include local interest groups, such as nature conservation organisations and marinas/sailing clubs. The consultation also included a Members Briefing at Medway Council.

Further public consultations are planned prior to the submission of permit applications, including a public meeting, public exhibitions and information points to disseminate project information and invite comments on the GridLink proposals.

Calendar of public consultations and next steps in UK

GridLink started public consultations in November 2017.

Since that time, there has been regular contact with the key stakeholders affected by the project activities, for example Medway Council, Port of London Authority, Peel Ports and professional fishermen associations. Public consultations are planned at key moments to inform the public about the progress of environmental studies and the project design.

The calendar of public consultations is summarised below:

  • Application for planning permission
  • Application for marine licence
  • Friday 11th September: Online public meeting from 18:30 to 20:30
  • Friday 4th September: Live chat session from 16:30 to 20:30
  • Friday 28th August: Launch of virtual public exhibition on the GridLink web-site
  • Friday 28th August to Friday 11th September: Information points at Dockside Outlet Retail Centre, St Mary’s Island and Riverside Country Park, Rainham
  • Thematic meetings with interest groups
  • Preparation of the Environmental Assessment reports for marine works and onshore construction works
  • Detailed environmental studies
  • Definition of measures to avoid, reduce and mitigate environmental impacts
  • Medway Council Members Briefing
  • Thematic meetings
  • Environmental baseline studies (ecology, birds, fisheries, noise)
  • Subsea geophysical and geotechnical survey
  • Onshore topographic, geophysical and geotechnical survey
  • Scoping workshop with environmental authorities and interest groups

Questions asked by the public

In France, GridLink carried out a preliminary consultation and then additional public consultations in accordance with the lessons learned.

The public consultations included six public meetings at important points in the project timetable, including at the start of the environmental studies, to provide a progress report on the environmental impact assessment and prior to the application for environmental authorisation:

07.12.2017 at Loon-Plage town hall
10.01.2018 at Bourbourg town hall
03.12.2019 at Loon-Plage town hall
10.12.2019 at Bourbourg town hall
07.10.2020 at Bourbourg town hall
14.10.2020 at Loon-Plage town hall

In the UK, GridLink carried out public consultations including an online public meeting on 11.09.2020 prior to the application for planning permission and a marine licence.  The public meeting was held online due to COVID-19 restrictions.

The questions that were asked at the public meetings are presented below:


  1. What steps have you taken to ensure that people are consulted effectively during the COVID-19 pandemic and lockdown?
  1. Will your consultation process be ongoing throughout the length of the scheme?
  1. How do you engage with local authorities?
  1. Have there been efforts to engage with those in the French fishing industry that may be impacted by the scheme?
  1. Has your consultation feedback been affected by being virtual, rather than in person?


  1. Will electricity flows between France and the UK go both ways? Why don’t the British produce the 1400 MW themselves? 
  1. Will this scheme only be used by the UK?
  1. The surplus of MW on the network allows the supply to the English. If French policy decides to close Fessenheim and has trouble opening Flamanville, will we still have surplus on the electricity grid?
  1. Regarding the French and European electricity strategy, an energy node is being formed at the level of the Dunkirk agglomeration. Is GridLink part of a bigger project to create, for example, a future nuclear power plant to meet growing energy needs?
  1. The power of the GridLink cable is 1,400 MW; IFA 2,000 is 2,000 MW. You go from 8 cables to 2 cables: does that mean that you increase the voltages and the cross-sections of the conductors?
  1. Are 500 kV cables a new technology?
  1. Who will design the two cables?
  1. Can Brexit call into question the realization of the project?
  1. Is the funding for the GridLink project completely private? Or is the State participating? 
  1. Is the GridLink cable installed to carry electricity from the nuclear power plant or that produced by renewable energies?
  1. Why haven’t we made the connection in the south of England, to avoid the detour and length of submarine cable?
  1. Is the progress of the project different in France and in Great Britain?
  1. For IFA 2000, 4 cables were damaged but the 4 others were able to take over, what happens if there is a problem on the 2 single cables?
  1. What is your experience on delivering projects of this scale? 


  1. Will the GridLink cable generate electromagnetic radiation when in use?
  1. Are the impacts of the cable in terms of electromagnetic field different for direct or alternating current?
  1. In comparison with the cables of the H2V project (250 kV), shouldn’t we bury more deeply the cables of 400 kV of the GridLink project? And how should groundwater tables be taken into account?
  1. Will there be an increase in soil temperature? To what extent?
  1. How high will the converter station be? 
  1. What will be the configuration and footprint of the future Warande substation?
  1. Are preventive archaeological excavations planned on the site of the converter station?
  1. Can the installation of the cable prevent a possible widening of the A16 motorway?
  1. What will be the impact on the environment and on the inhabitants located near the converter station? Why were the inhabitants of Saint Georges sur l’Aa not invited when they are also affected? 
  1. At the converter station, will electromagnetic radiation be generated? I ask the question for the population located nearby … And if a sound study is done, will there be noise?
  1. Is it possible to specify the exact route of the cable on the Port land? 
  1. Will there be more lightning strikes on the Warande substation and the future Bourbourg substation? What are the risks of repercussions for surrounding homes?
  1. Do you see there being any environmental effects from this project that are not covered by your environmental report?


  1. Will the cable burial work have an effect on farmers’ crops? 
  1. Will the cable’s burial depth allow agricultural activities to resume on the surface?
  1. Who is in charge of verifying that the restoration of land is carried out by the companies?
  1. 9 hectares of agricultural land will disappear. The fear of farmers is: will ecological compensations consume other agricultural land?
  1. Will the Wateringues issue be taken into account during the cable installation work?
  1. What will be the impacts on the landscape?


  1. How will the Warande substation be linked to the converter station? 
  1. Why not build the converter station near the Warande substation?
  1. Why extend the Bourbourg station when RTE has other sites?

Answers to these questions were given at the public meetings.  These answers, together with additional information if available, are presented in the Questions Asked by the Public.  The questions have been grouped together were necessary so that a comprehensive answer can be given.

GridLink is not permitted by European Union rules to produce power or trade power transported through the interconnector.  These rules are designed to prevent any company having a monopoly on both power generation and transportation.

GridLink will own and operate the interconnector and earn income by charging a fee to other companies to send power through the interconnector.  The income earned by GridLink will be regulated by Ofgem in the UK and Commission de Regulation de l’Energie (CRE) in France.

The use of the interconnector must be offered on a non-discriminatory basis.  Power may be transported in either direction from France to UK or vice versa at any time. 

The amount of power that is transported will depend on the supply and demand for electricity.  In particular, it is expected that the interconnector will be used for the transport of excess renewable energy, such as wind or solar, or nuclear power, which becomes available when the supply exceeds the local demand or existing grid capacity.  Therefore, the interconnector will facilitate the use of low carbon sources of energy that would otherwise be unused and lost.

During the transport of electricity over long distances, a power cable loses energy due to the heating of the conductor caused by the electrical current. Additional energy is lost due to the energy demand, heating, noise and other phenomena related to the operation of ancillary equipment needed to connect the power cable to a local distribution system or consumers at each end.

The laws of electricity mean that operating the power cable at high voltage reduces the electrical current.  This, in turn, reduces the energy losses.

The amount of energy loss is influenced by the cable design and length.  Energy losses are reduced if the cable length is shorter.

Transmitting electricity as direct current has lower energy losses than alternative current because the current is uniformly distributed across the conductor.  In alternating current, the current is concentrated at the conductor surface which increases the energy losses.

Whilst direct current technology always has lower energy losses, it is more expensive to install.  Therefore, alternating current is preferred for economic reasons for transport of electricity over short distances, up to the point where the lower costs of the equipment is outweighed by the higher operational energy losses.

For GridLink, it is estimated that the total energy losses will be in the range 2% to 2.5%.  For an equivalent system operating with alternating current, the losses are expected to be 6% to 7%.

Therefore, GridLink has chosen to utilise a high voltage, direct current cable to obtain the lowest energy losses.  The relatively short cable length will also minimise the energy losses related to the interconnection.

Electromagnetic fields are generated by a power cable due to the electric current flowing through the conductor. The current produces both an electric field and a magnetic field, which are collectively referred to as electromagnetic fields (EMF).

The design of the cable, including metallic screening, lead sheathing and/or armouring, contains the electric field within the cable and prevents any propagation into the environment.  Therefore, there are no electric fields around the cable.

However, a power cable does produce a magnetic field that emanates into the surrounding environment. 

For subsea cables, a phenomenom is possible that an electric field is induced by the movement of water currents or other objects through the magnetic field.  The burial depth of the cable under the seabed prevents any measurable induced electric field caused by this phenomenon.

The magnetic field of the cable should be considered in the context of the background geomagnetic field of the Earth, which ranges from 25 to 65 μT.  At the location of the GridLink interconnector, the Earth’s geomagnetic field is approximately 50 μT.  People are often exposed to higher magnetic fields on a regular basis from portable electrical gadgets and equipment, including hair dryers, vacuum cleaners and microwave ovens.  Magnetic Resonance Imaging (MRI) used for medical diagnosis exposes patients to more than 100,000 times the background geomagnetic field.  The International Commission on Non-Ionizing Radiation Protection (ICNIRP) most stringent guideline value for limiting public exposure to magnetic fields is 500 μT, with the level to protect public health set at 40,000 μT.

The magnitude and range of a magnetic field from a power cable depends on the configuration of the cable, strength of the electric current and the density of the surrounding material.  The GridLink interconnector consists of two high voltage, direct current power cables that are bundled together. In this configuration, the electric current in each cable is flowing in opposing directions to complete the circuit.  As a result, the magnetic field produced by one power cable is equal and opposite to the other cable and they tend to almost cancel each other out.  The residual magnetic field is very small. 

With a burial depth of 1.5m on land and 2m under the seabed, it is expected that the increased magnetic field above the cable may range from no change up to 20% above the typical background of approximately 50 μT.  Any magnetic field will not be detectable within 5m to 10m from the cable. Any increase is also well below the ICNIRP guideline values and within the natural variation of the Earth’s geomagnetic field, so it has no negative effects.

The depth of burial of the cable will be determined by the type of soil, existing underground public utilities and environmental features that must be crossed.

The indicative depth of the cable is 1.5 m.  This is a typical burial depth for electricity cables.  The cable will be protected from accidental disturbance by a protective concrete layer above the cable and a warning marker buried in the soil.  It will not be possible for anything to accidentally penetrate the cable from above due to this protection.

Where the cable crosses railways, road embankments and water drainage canals, horizontal directional drilling will be used to enable the cable to pass underneath the existing infrastructure.  Such horizontal directional drilling may be 5-10 m below ground level.

The burial of the cable is shown in the illustration below:

The cable will be buried at sufficient depth to ensure that farming can continue after the cable has been installed.  The only restriction on the land will be the prohibition of new farm buildings within 5m.  All other surface land uses, including access roads, ploughing and harvesting will be unaffected.

The cable installation will require the excavation of a trench.  The topsoil will be removed and kept separate from other excavated materials.  After cable installation, the trench will be backfilled and restored with the return of the topsoil layer.

The restoration of the trench and any temporary construction areas will be carried out in a way to avoid changes to the compaction of the soil or drainage of the land.

The Environmental Impact Assessment has included a pedology study carried out by the Chamber of Agriculture.  This study will be used to inform the environmental and technical studies to ensure that the agricultural soils are properly protected during construction works and restored afterwards.

The converter station and cable installation will generate traffic during construction.  The construction traffic will comprise the typical vehicles used for all construction projects, including workers cars and mini-buses, light good vehicles and trucks.  A small number of special loads due to size or weight, such as delivery of transformers, will be required.

During operation, the converter station has a small number of employees and does not require routine delivery of any materials or consumables.  Therefore, there will be very small traffic generation during day-to-day operations.

The converter station will comprise a range of industrial buildings containing electrical equipment, together with some outside electrical equipment installed within fenced compounds.  The converter station will require 3-4 ha of land, with less than 2 ha being developed as buildings.

According to preliminary designs, the main buildings are a valve hall up to 25 m high, reactor hall up to 20 m high and other service, control and storage buildings up to 10 m high.  In addition, transformers, harmonic filters and switchyard equipment may be up to 15 m in height.

The buildings will be designed to resemble typical logistics and distribution warehouses or similar industrial buildings.  The colour scheme and building materials can be chosen to assimilate with other buildings in the area or landscape designs.

In addition to the benefits to electricity producers and consumers through improved network integration, security of supply and reduction in wholesale electricity prices, there will be local economic benefits.

The construction of the GridLink project will employ local companies and workers.  Although the main electrical equipment and cables for the converter stations are manufactured in specialist factories, local companies will be needed to supply construction materials and equipment, construction services, transport and logistics, temporary accommodation, catering, office and similar services.  The construction works will require a range of skilled construction workers and manual labourers, with a team of up to 300 workers at each converter site.  It is expected that local construction workers will be employed to carry out many tasks, including site surveys, site preparation, excavation and civil works, foundations, building erection, supply and installation of public utilities, supply and installation of general equipment, and landscape restoration.

For the offshore cable-lay activities, port facilities, berthing, victualing, refuelling and associated services will be required for the specialist cable-lay vessels and any support ships.  These are likely to be provided by the Port of Dunkerque and/or Port of Sheerness, or other nearby ports.

During operation, there will be a small number of operations personnel at the converter station sites, as well as service contracts for security, property maintenance and landscape gardening.  The operations personnel will be supplemented by maintenance engineers and support workers responsible for routine maintenance and repair, including regular major maintenance activities each year or every two years.

GridLink Interconnector Ltd will pay national corporate taxes and local business taxes, such as the Cotisation Foncière des Entreprises (CFE) in France and business rates in the UK.  These taxes are based on company revenues and/or property valuations, so they will depend on the company’s financial performance and land valuations set by the local authorities.  They are expected to make a significant contribution to local tax income.

Therefore, the provision of construction services, employment of construction and operations workers and payment of corporate taxes are expected to make a notable, positive contribution to the local economy.