Tarchon Energy Limited plans to undertake a statutory consultation on the Tarchon Interconnector under the Planning Act 2008 in early 2026, following the early non-statutory consultation and Environmental Impact Assessment scoping work.
In 2025, Tarchon intends to begin a series of offshore marine surveys in UK waters to analyse seabed and sub‑seabed composition and the wider marine environment along the proposed HVDC subsea cable corridor, providing geophysical and environmental data to optimise cable routing and protection design.
By mid-October 2025, the Environmental Impact Assessment (EIA) Scoping process for the Tarchon Interconnector was underway, with Tarchon Energy preparing to submit the scoping documentation to the Planning Inspectorate in the coming months as part of progressing the project’s development.
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Tarchon Energy Interconnector is a GB–DE high‑voltage transmission project designed to provide a firm point‑to‑point link between East Anglia (UK) and Niederlangen, Lower Saxony (Germany). The project aims to increase cross‑border market integration, support system balancing and security of suppl...
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EN0210009, Tarchon Interconnector, Tarchon Energy Interconnector, NESO TEC PRO-001289
The Secretary of State for Energy Security and Net Zero issued a direction under section 35 of the Planning Act 2008 for the Tarchon Interconnector Project, confirming that it will be treated as a project under that Act (a Nationally Significant Infrastructure Project) for consenting purposes, with the direction and accompanying letters later published on the Planning Inspectorate’s NSIP portal.
On 7 April 2025, the UK Secretary of State for Energy Security and Net Zero issued a direction under section 35 of the Planning Act 2008 for the Tarchon Interconnector Project promoted by Tarchon Energy Limited. The direction classifies the project as an electricity transmission interconnector of national significance for which development consent is required under the Planning Act 2008.
Tarchon plans to commence a programme of onshore environmental and ecological surveys at the converter station site, along the proposed underground cable corridor, and at the landfall location, with species‑specific surveys scheduled to run from March 2025 through summer 2026 to inform the Environmental Impact Assessment.
By 10 March 2025, Tarchon Energy had completed site selection and feasibility work to identify a preferred zone for the onshore converter station, which will connect via underground cabling to National Grid’s proposed East Anglia Connection Node (EACN) 400 kV substation in Essex.
Tarchon Energy Limited launched an initial early non-statutory public consultation on the proposed Tarchon Interconnector, inviting residents, businesses and stakeholders in Essex and along the route to provide feedback between 10 March and 7 April 2025 via online channels and four in-person events in Ardleigh, Wix, Lawford and Harwich.
By 18 February 2025, Volta Partners had acquired and held a minority ownership stake in Tarchon Energy Limited, the project company developing the Tarchon Interconnector led by Copenhagen Infrastructure Partners (CIP). This established a shareholder structure in which CIP is the main developer while Volta Partners participates as a minority equity investor with experience in transmission and interconnector projects.
In 2025, Tarchon plans to carry out a series of offshore seabed and sub-seabed surveys to analyse marine environmental and geological conditions along the proposed interconnector route, which will inform detailed design and micro-siting of the subsea cable and its protection strategy.
In November 2024, Ofgem confirmed its support for the 1.4 GW Tarchon interconnector to proceed and participate in the regulatory cap and floor process, stating that the project is in the interests of Great Britain’s consumers.
On 12 November 2024, Ofgem’s Initial Project Assessment decision for the third cap and floor window concluded that the 1.4 GW Tarchon interconnector to Germany is likely to be in the interest of Great Britain’s consumers and therefore granted it a cap and floor regime in principle, confirming regulatory revenue support for the project.
Ofgem opened a public consultation on its initial project assessment for the third cap and floor application window, setting out a minded-to decision to approve only the 1.4 GW Tarchon interconnector to Germany while rejecting six other proposed interconnectors, and inviting stakeholder responses up to 30 April 2024.
On 1 March 2024, Ofgem issued a press release as part of its cap and floor window 3 and Offshore Hybrid Assets pilot work, specifically addressing the potential impact of the proposed Tarchon interconnector on GB network constraint costs.
On 1 March 2024, Ofgem submitted its ‘minded‑to’ recommendation to approve the 1.4 GW Tarchon interconnector under the Window 3 cap and floor regime and launched a consultation on this position, identifying Tarchon as the only one of seven applicant interconnectors it was inclined to approve for regulatory support.
On 28 November 2023, the European Commission adopted a delegated regulation updating the Union list of Projects of Common Interest and Projects of Mutual Interest, which includes the "Interconnection between Emden areas (DE) and Corringham, Essex (UK) [currently known as ‘Tarchon’]" as a Project of Mutual Interest in the North-South electricity interconnections in Western Europe corridor. This formally designates the Tarchon Energy Interconnector on the EU PCI/PMI list.
Ofgem granted Tarchon Energy Limited an electricity interconnector licence under section 6(1)(e) of the Electricity Act 1989, authorising it to participate in the operation of the Tarchon Interconnector linking the East Anglia Coastal Connection Node in Great Britain with Niederlangen in Lower Saxony, Germany.
Tarchon Energy Ltd submitted an application to the Gas and Electricity Markets Authority (Ofgem) for an electricity interconnector licence under section 6(1)(e) of the Electricity Act 1989, covering participation in the operation of the proposed Tarchon Interconnector between the East Anglia Coastal Connection Node in Great Britain and Niederlangen in Lower Saxony, Germany.
During Ofgem’s third cap and floor application window, which ran from September 2022 to January 2023, Tarchon Energy Limited applied to have the 1.4 GW Tarchon interconnector between Great Britain and Germany assessed under the cap and floor revenue regime, as one of seven interconnector projects submitted in Window 3.
National Grid has offered the Tarchon Energy Interconnector a grid connection at the proposed East Anglia Connection Node (EACN) 400 kV substation in Tendring, Essex, establishing the intended UK grid connection point for the 1.4 GW GB–Germany interconnector. This offer defines where Tarchon’s onshore infrastructure would plug into the National Electricity Transmission System once built.
Tarchon has been designated as a Project of Mutual Interest (PMI), recognising it as a key cross‑border electricity infrastructure project linking Great Britain with an EU member state and contributing to affordable, secure and sustainable energy and long‑term decarbonisation objectives.
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