• Frequently Asked Questions

Here you will find answers to frequently asked questions. If you cannot find an answer to your question, please use the contact details provided to get in touch with the project team.

About the Project

How much electricity will AQUIND Interconnector be able to supply?

It is estimated that AQUIND Interconnector will have sufficient capacity to transmit up to 16,000,000MWh of electricity annually between GB and France, accounting for approximately 5% and 3% of their respective total electricity consumption.

*BEIS, Energy Consumption in the UK (ECUK) (2018): https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/729326/ECUK_

How much will the Project cost? 

The Project is estimated to cost £1.24bn.

 How will the Project be funded?

The Project is to be funded through project finance funded and secured against the operations profits (revenues). This is not unusual for a project where the securing of funding is dependent on the securing of a development consent order. It is not anticipated that there will be any funding shortfalls for the Project at the time when such finance is required.

What impact will Brexit have on this Project?

The UK Government’s policy on interconnectors has not changed since the EU referendum in June 2016.

From an economic perspective, the trade in electricity will still be very beneficial for both UK and France following Brexit. Border tariffs on electricity are not normally applied anywhere in the world.  There is also a strong opinion in the GB and EU energy industry, that GB is a vital element of the pan-European energy system and an important contributor to the overall security of supply and climate goals strategy.

What stage is the French planning process currently at?

An application has been submitted to the French authorities for an environmental authorisation and AQUIND are awaiting the outcome of that process.

How long will the Project be operational for?  

It is anticipated the Project will be operational for a minimum of 25 years, and the majority of equipment will a have useful life of up to 40 years or more.

Converter Station

Why is Lovedean identified as the preferred Converter Station location? Were alternative locations considered?

Lovedean substation was identified as the preferred connection location for AQUIND Interconnector following an assessment by National Grid, who have an obligation to develop and maintain an efficient, coordinated and economical electricity transmission network. The assessment considers factors such as National Grid’s knowledge of the existing network (including agreed future connections), agreed cost information, environmental considerations and other constraints associated with the Proposed Development, alongside input from AQUIND on the details of the assets to be connected.

The Converter Station needs to be located as close as possible to the substation in order to minimise the length of AC cable used as part of the Interconnector. This is because AC cables take up a much wider corridor of land when compared to DC cables. Therefore, in order to reduce the impacts of the proposals, it is favourable to maximise the use of DC cables, which take up a considerably narrower corridor. AC cables also have higher transmission losses and pose other technical challenges, meaning that a longer AC cable would reduce the benefits of the Proposed Development.

Further details regarding the converter station location selection process, including alternatives considered, are contained within the Alternatives chapter of the Environmental Statement, which is available on the Application Documents page.

Why did you not submit a detailed Converter Station design? 

It is important that some design flexibility is retained for when a construction contractor is appointed. To achieve that flexibility, the final design of the Converter Station will be confirmed after the grant of the DCO and will be required to be in accordance with the spatial parameters and design principles set out in the DCO and the Design and Access Statement accompanying the application.

We have undertaken substantial consultation with relevant stakeholders, including Winchester City Council, East Hampshire District Council and South Downs National Park Authority on the spatial parameters and ‘design principles’ which the final design will be required to comply with. The detailed design would be approved via a condition of the DCO, known as a ‘Requirement’.

How will operational noise from the Converter Station be mitigated?

The Environmental Statement provides an assessment of the impacts on noise and vibration from the Proposed Development including for construction (both of cables and converter station (and buildings and works associated with it), operation and decommissioning. This is set out in Chapter 24. The assessment methodology and criteria have been agreed with the relevant local authorities. In relation to the Converter Station mitigation measures have proposed and aspects of the design and layout have been influenced by the need to minimise noise.  For the operational assessment the noise modelling prediction assumes a reasonable worst-case with respect to wind speed and direction.  Tonal characteristics from the operational converter station have been considered through assessment of noise levels across different frequencies.   Mitigation has been proposed.

The DCO is subject to a Requirement requiring an operational noise management plan to be submitted and approved in relation to the use of the Converter Station which must include the measures and methods for monitoring operational noise and a complaints procedure. The noise management plan must be implemented and maintained for the operational period of the Converter Station.

What route will construction traffic take to the Converter Station site?

A Framework Construction Traffic Management Plan (FCTMP) has been submitted with the Application which provides an overarching plan as to how the construction traffic and site operations will be managed for the onshore components.  This will mainly relate to construction of the Converter Station.  The FCTMP can be found as an appendix to Chapter 22 of the Environmental Statement on Transport.

Construction traffic using the Converter Station Area will use Junction 2 of the A3(M), B2149, A3 Portsmouth Road, Lovedean Lane and Day Lane.   Construction traffic to/from the works at Anmore Road will be routed either via the Converter Station compound and Broadway Lane/Anmore Lane or directly from junction 3 A3(M), Hulbert Road, A3 London Road, B2150 Hambledon Road and Mill Road.


Why is Eastney identified as the preferred landing point location? Were alternatives considered?

Eastney was chosen as the preferred option after an extensive optioneering process which took account of a wide range of factors.

The search for an appropriate landing point began in 2014/15 with 29 possible landing points being identified between Weymouth, in the west, and Bognor Regis, in the east.

When Lovedean was identified by National Grid as the preferred grid connection point, a total of seven potential landing points were prioritised.

These landing points were then subjected to a further detailed study to assess their suitability and as a result of this work, Eastney, Hayling Island and East Wittering were shortlisted as potential landing points.

Hayling Island was subsequently removed from the shortlist. This was primarily due to the requirement to cross Chichester / Langstone Harbour at Langstone Bridge, which presented significant engineering and environmental constraints.

A more detailed review of East Wittering and Eastney locations was undertaken from a marine cable installation perspective in discussion with experienced marine installation contractors. Eastney was chosen as the preferred option as this minimised the length of the onshore cable route between the landfall location and converter station locations, which in turn minimised disruption and the impacts of the proposals.

Further details regarding the landfall selection process, including alternatives considered, are contained within the Alternatives chapter of the Environmental Statement, which is available on the Application Documents page.

What development is proposed at the landfall location at Eastney?

At the landfall location in Eastney, a Transition Joint Bay (‘TJB’) will be constructed – this will be a buried structure that contains the joints between the onshore and offshore cables. The onshore cables will enter the structure underground, and the offshore cables will leave it underground – either through a backfilled trench or through a duct installed by Horizontal Direct Drilling (‘HDD’) or similar means.

In addition up to two Optical Regeneration Stations, required in connection with the fibre optic cables which form part of the Proposed Development, will be required and is proposed to be located at the Landfall. An Optical Regeneration Station would be provided in a building would be up to 4m high and located within a securely fenced compound. This would also potentially contain auxiliary power generation equipment and a fuel tank. It is currently anticipated that the compound for an Optical Regeneration Station would have a maximum size of 17 m x 34 m. Outside the compound, it is anticipated that there will be parking for up to two vehicles for maintenance purposes. If there are two Optical Regeneration Station buildings, it would be necessary for them to be located approximately 10m apart

Cable Corridor

How will the cables be installed? 

The majority of cables will be installed in excavated trenches (approx. 1m deep). There are four HVDC cables and two fibre optic cables to be installed. The cables will be installed in two separate trenches (also referred to as “circuits”). There will be two HVDC cables and one fibre optic cable per circuit.

To avoid the need to keep long sections of trench open to lay the cables, cable ducts will be installed and the tranches then backfilled and resurfaced, allowing for the cables to be pulled through at a later date with relatively little impact or disruption to traffic.

Where the cables are laid in or adjacent to a highway, the installation will require traffic management measures.

In certain locations the cables will be installed via a method known as horizontal directional drilling (‘HDD’). HDD is a trenchless installation method used to cross beneath areas where conventional construction methods cannot be used due to engineering or environmental constraints, where other methods may cause damage, or where access is restricted.

How long will the cables take to install?

The cable ducts will be installed in sections of approximately 100m. Typically, the installation rate for cable ducts per circuit (or trench) is approximately 18m to 30m per day in urban areas and up to 50m per day across open land. It is estimated that it could take an average of 1 week to install the cable ducts for a 100m section and it is anticipated that up to six 100m sections on the cable route may be constructed at the same time, reducing the overall period of installation.

Will the cable pass under any homes or gardens?

It is not intended that the equipment will be laid within the boundary of any homes or gardens along the proposed cable route, and no such land is included within the order limits for this purpose. AQUIND’s intention is to locate the cables within existing highways or road verges wherever practicable. In certain locations, where there are constraints to using the highway or associated verge, it may be necessary to utilise land outside the highway.

There are areas where rights in private land are sought for cable installation or equipment. AQUIND’s land agent is liaising directly with the relevant landowners and/or their agents.

Other Questions

What are the timescales/next steps for the Proposed Development?

  • Members of the public are able to ‘register their interest’ in the application with PINS, become an ‘Interested Party’ and provide a summary of their views in writing by submitting a ‘Relevant Representation’ between 2 January to 19 February 2020.
  • PINS will appoint Examining Authority to the Proposed Development in early 2020, and it is anticipated there will be a preliminary meeting in relation to the process for the examination and a timetable for the examination confirmed in Spring 2020. Based on a preliminary meeting in Spring 2020, the examination of the application for development consent is anticipated to be ongoing for six months between Spring 2020 and Autumn 2020.
  • The Examining Authority will make a recommendation to the Secretary of State by not later than three months following the close of the examination and the Secretary of State will make the decision on whether to grant development consent for the Proposed Development within three months following receipt of the recommendation.

Further information regarding the DCO process is available here.

When and how did AQUIND undertake consultation?

Before submitting the application, AQUIND undertook two rounds of public consultations: in January 2018 and in February – April 2019. A total of three and nine public exhibition events were held for each consultation respectively, where members of the public had the opportunity to view the proposals, discuss them with the project team and provide their thoughts using the feedback forms provided. In addition, for the duration of the February – April 2019 consultation, all of the consultation documents were also made available to view at ten deposit locations across Hampshire, whilst individuals could also request USBs containing the consultation documents from the project team.

Almost 1,000 local residents and stakeholders attended 12 consultation events across both consultations, with a total of 155 responses being submitted during the most recent consultation.

What will be done to mitigate any environmental impacts?

AQUIND has submitted an Environmental Statement (ES) as part of the DCO application which reports the environmental impact assessment undertaken for the Proposed Development, identifies likely significant environmental impacts which may be caused by the Proposed Development and details  proposed  measures to mitigate those impacts which will be secured and required to be carried out by the DCO, if granted.

A copy of the ES can be found on the Application Documents page.

How will construction be managed?

AQUIND has submitted a Framework Construction Environmental Management Plan (CEMP) with the DCO application. The CEMP will set out the overarching principles for onshore construction process and establish good management practices to ensure that construction impacts on the public and the environment are minimised. Work specific CEMP’s will be required to be produced and approved in compliance with the Framework CEMP and the construction of the Proposed Development onshore in the UK will be required to be carried out in accordance with the relevant approved CEMP.

How will traffic be managed during construction?

AQUIND has submitted a Transport Assessment (TA) and a Framework Traffic Management Strategy (FTMS) as part of the DCO application.

The TA details the anticipated impact on all forms of traffic and travel during the construction phase, whilst the FTMS details proposed mitigation and working practices and provides an indicative construction programme, taking into consideration environmental constraints, major events, school terms and other restrictions to minimise the impact where possible.

Works specific Traffic Management Strategies (TMS) relevant to the cable installation works will be required to be produced and approved in compliance with the FTMS and the installation of the cable onshore will be required to be carried out in accordance with the relevant approved work specific TMS.

How does the submitted application differ from the proposals presented at the February – April 2019 consultation? 

In response to feedback and discussions with stakeholders, a number of alterations have been made to the proposals to address the comments received.

Some of the key changes include:

  • Refinement of the cable corridor in the vicinity of Denmead, Milton and Eastney;
  • Additional clarity regarding the precise landfall location; and
  • Additional visual mitigation measures around the Converter Station.

Further details regarding the alterations made to the proposals can be found in our Acceptance Update Newsletter, and within Chapters 10 and 17 of the Consultation Report, which is available to view on the Application Documents page.

Where can I view the application documents?

The application documents are available on the Application Documents page, and on the Planning Inspectorate’s website.

Will the Proposed Development generate a harmful electromagnetic field? 

Due to the earthed shielding of the HVAC Cables and HVDC Cables there will be no electric field present along the Onshore Cable Route. In addition, the electromagnetic field strengths of the HVDC and HVAC cables and the conversion process are significantly below the limits set by the relevant guidelines, are fully compliant with International and are fully compliant with UK health and safety standards.

Will CPO powers be used? 

The majority of the cables will be installed in the public highway, minimising the need for private land to be acquired. However, some private land interests will be required to deliver the Proposed Development and AQUIND is committed to acquiring all interests by voluntary private agreement. AQUIND has sought powers of compulsory purchase as part of its application for development consent for in the event that it is not possible to acquire the necessary land or rights by voluntary private agreement.

Where residential landowners of houses adjoining the proposed onshore cable corridor were contacted as part of the consultation process, this was purely in their capacity as the presumed owner of highway subsoil. An easement will be acquired over the highway subsoil via compulsory acquisition in connection with the installation and use of the cables in that land, which is to be acquired without negotiation or the payment of compensation. This is because the relevant owner has no use or enjoyment of the subsoil land, is not prejudiced by the rights to be granted over it that are necessary for the Proposed Development, and because the subsoil of a highway is not recognised to have any market value.

Compensation for residents/businesses

AQUIND will be subject to statutory requirements in relation to compensation and where any compensation is evidenced to properly be payable, this will be required to be paid.

What are the local benefits? 

The Proposed Development has the potential to deliver local benefits by virtue of its construction. For example, it is estimated that around 250 people will be working on site at the peak of the construction, which should mean more custom for local services, restaurants and stores.

AQUIND is committed to mitigating the impacts of the Proposed Development. Mitigation measures are captured in Requirements (i.e. the DCO version of a planning condition), such as measures to manage disturbance caused by construction.

AQUIND will continue to consider securing additional measures (planning obligations) where appropriate and where the relevant legislative tests are met. Discussions are ongoing with the relevant local authorities in this regard.

Whilst discussions are ongoing with relevant local authorities in in relation to potential community contributions, it is considered that the planning mitigations proposed to be secured are appropriate and proportionate to mitigate the impacts of the Proposed Development and to date it has also not been evidenced how community contributions would satisfy the relevant legislative tests to be valid planning obligations (i.e. by being necessary to mitigate an impact of the development and fairly and reasonably related in scale and kind).