Author: Munti Nguyen

Nemo Link celebrates its fourth anniversary with exceptional operational performance, supporting security of supply in both the UK and Belgium

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Nemo Link, the first electricity interconnector between the UK and Belgium, recorded exceptional performance in 2022. The subsea cable was available 99% of the time last year, making it one of the most reliable assets of its kind in the world. It’s also important to note that there was no unplanned maintenance during this period.

5.7 TWh of electricity were exchanged between the two countries in 2022. For the first time, the flows between the two countries were almost identical (with import flows to Belgium 45% of the time in 2022, against only 4% in 2021).

Nemo Link demonstrated how key its role is in strengthening security of supply for British and Belgian consumers. For example, in July, the 140 kilometer link avoided major supply problems in London.

The subsea interconnector also provides more opportunities for balancing grids and limiting the impact of imbalance between supply and demand, which is increasingly important with the growth of intermittent renewables. The additional flexibility provided by the high voltage direct current (HVDC) interconnector could limit peaks in imbalance prices.

Nemo Link is also the first interconnector to be delivered under the so-called ‘Cap and Floor’ regulatory framework, which sets a maximum and minimum revenue levels. The Belgian and British regulators have recently approved a Within Period Adjustment request by Nemo Link, which will deliver around  to consumers earlier than expected. This will result in grid tariffs being reduced by €67.2 million in each country.

Notice to bring into effect Nemo Link’s approved Access Rules from 1st January 2023

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We are pleased to announce that the Nemo Link’s modified Access Rules have been approved by the GB and Belgium regulators.

This notice, made in accordance with Article A5.1 of the approved Access Rules serves to bring the Nemo Link Access Rules v4 into effect for capacity delivered from 1st January 2023.

This version of the Access Rules has also been published on the Publication page of the Nemo Link website, together with the current Access Rules effective until 31st December 2022.

As previously communicated, changes included in the new Access Rules are:

  1. Returning to a Loss Adjusted Day Ahead Market Spread (LADAMS) based compensation for curtailments ensuring operation remains within operational security limits before the day-ahead firmness deadline (Article 59.1, Appendix 1 Rules for Forward Capacity Allocation on the GB-Belgian Border); and
  2. Enabling Long Term right returns in months with a planned maintenance period (Article 38.2, Appendix 1 Rules for Forward Capacity Allocation on the GB-Belgian Border); and
  3. Clarifying the treatment of allocated rights when the JAO Participation Agreement has been suspended (Article 71.5, Appendix 1 Rules for Forward Capacity Allocation on the GB-Belgian Border); and
  4. Earlier opening of the Long Term nomination gate brought forward from 16:30 CE(S)T D-2 to 13:30 CE(S)T D-2 (Article 6.1, Appendix 2 Nomination Rules for Long Term Transmission Rights on the GB-Belgian Border); and
  5. Housekeeping changes in light of the revised Harmonised Allocation Rules.

Nemo Link considers that the approved Access Rules will better achieve all relevant access rules objectives provided by the  aforementioned amendments,  particularly with the enhanced financial firmness and by enabling market participants to participate in Long Term auctions with more confidence and  less  risk, as detailed in our consultation proposal for modifying the Access Rules.

If you have any questions or need further information, please don’t hesitate to contact the Nemo Link Customer Team.

Nemo Link’s views on EU CBAM and call to EU legislators

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The aim of the EU Carbon-Border Adjustment Mechanism (CBAM) to prevent carbon leakage is admirable.

However, the detailed legislative proposals currently don’t consider well how electricity is traded in practice. Nemo Link expects that this will most likely lead to a double and/or unnecessary carbon taxation on electricity imported into the EU. Currently carbon-free imports would be even penalized more than electricity originating from thermal power plants.

In particular the CBAM drafting assumes by default that all imports of electricity from Third Countries are originating from fossil power plants. The current legislative drafting also makes it also very hard to consider the actual carbon content for imported electricity. This fails to consider renewable sources of electricity as export drivers and could discourage green electricity imports from outside the EU in the future.

In addition, in order to be eligible for a rebate against CBAM costs, an importer to the EU must provide proof that the goods they are importing have had a specific carbon price paid in the third country. However, this might not work well for one of the key sectors covered by CBAM, electricity, as it is virtually impossible to track the carbon price paid by electricity as most electricity, like an interchangeable commodity, is commonly traded nationally/internationally via anonymous exchange based transactions which makes a direct administrative trail between the producer and importer almost impossible to establish.

Once the EU CBAM is financially introduced, imports of electricity into the EU from third countries are expected to materially decrease, not because they are more carbon intensive than their EU equivalents, but simply due to the increased compliance costs and double and/or unnecessary carbon taxation. This is expected to lead to increased power prices in the EU.

The decreased imports are expected to lead to an increased activation of less efficient power plants in the EU and an increased curtailment of renewable plant output in the Third Countries. Both would lead to an increase in CO2 emissions overall and this will mean that the main aim of the EU’s CBAM is not met.

This type of trade barrier could also negatively impact the further buildout of additional interconnections with Third Countries and negatively impact some of the GB-EU Multi-Purpose Interconnector projects that are currently being considered.

The EU-GB electricity trade is particularly exposed to the unintended consequences of the EU’s CBAM given the level of interconnectivity, the UK’s very ambitious renewable buildout and net zero targets. Currently it was even expected that GB would have become over time a net exporter of electricity towards the EU. Especially in times of high RES output the EU was expected to be importing electricity from GB.

Given the expected impacts we urge EU policy makers to incorporate some changes to the latest CBAM legislative drafting.

Some minor wording changes on Article 9 that deals with the determination of the Carbon price paid in the country of origin would already be very beneficial.

Given the advanced stages of the CBAM negotiations, and to keep open the possibility for further (needed) changes/clarifications, it is important that the proposed review clause (Art.30) is sufficiently broad so as to allow such/clarifications changes to EU CBAM Regulation well-before its targeted financial implementation.

In the presentation prepared by Nemo Link (here) more information can be found on the topic (from a EU-GB perspective) and also some suggested wording changes to the latest legislative CBAM drafting are included.

Nemo Link Access Rules Updates

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Earlier this year, Nemo Link launched a consultation on the latest version of its Access Rules. We are pleased to inform market participants that the modification proposals of the Access Rules have been submitted to the GB and Belgian regulators for their approval.

Many thanks for all the responses we received from the Access Rules consultation. We highly value your feedback and thank you for your time in putting together your comments.

Proposed changes in the consultation

The main changes are driven by customer feedback received in our customer survey, and house-keeping changes resulting from the latest version of the Harmonised Allocation Rules.  These include:

  1. Returning to a Loss Adjusted Day Ahead Market Spread based compensation for curtailments ensuring operation remains within operational security limits before the day-ahead firmness deadline; and
  2. Enabling Long Term right returns in months with a planned maintenance period; and
  3. Clarifying the treatment of allocated rights when the JAO Participation Agreement has been suspended; and
  4. Earlier opening of the Long Term nomination gate brought forward from 16:30 CE(S)T D-2 to 13:30 CE(S)T D-2.

Proposed changes submitted for regulatory approval

The above changes have been submitted to the both regulators Ofgem and CREG. In addition, some minor changes have been made in the Access Rules submission for regulatory approval compared to the consulted documents, namely:

  • Further aligning with the Harmonised Allocation Rules (to reflect 2019 and 2021 HAR changes).
  • Removing the proposed wording from the consultation in article 71.4 (Appendix 1- Rules for Forward Capacity Allocation on the GB-Belgian Border) and instead adding the text from the latest HARs in article 71.5 (with regards to change c: Clarifying the treatment of allocated rights when the JAO Participation Agreement has been suspended).
  • Correction of an error made in the consultation with regards to the closing of the Long Term nomination gate (it should be 8:45 CE(S)T D-1 as it is in our current approved Access Rules instead of 9:00 CE(S)T D-1 as written in the consultation).


Subject to regulatory approval, we envisage implementation of the new Access Rules around December 2022. As soon as we receive a decision from the regulators, we will issue a notice for entry into force to the market.

If you have any questions on our proposed Access Rules in the meantime, please don’t hesitate to contact the Nemo Link Customer Team.

Consultation on Proposed GB Use of Congestion Income Methodology

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Article 19(4) of the Retained Electricity Regulation (Regulation (EU) 2019/943 as amended by Regulation 7 and paragraph 18 of Schedule 4 of the Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (2020 No. 1006) (the ‘Retained Regulation’) puts a requirement on GB TSOs to propose a methodology outlining conditions for the use of congestion income (UCI) revenues, in accordance with the provisions of that Retained Regulation.

Interested GB TSOs have worked together to draft this proposed GB UCI methodology, which is now published for consultation (in line with the provisions of Article 19). We would like to invite stakeholder feedback on the methodology. Attached here is the proposed methodology and a supporting explanatory document which provides further context.

Please provide your feedback to by Tuesday 12 July 2022.

Nemo Link Consults on Access Rules

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Nemo Link today launches a consultation on the latest version of its Access Rules ahead of submission to regulatory authorities for approval.  The consultation mainly covers compensation in the event of curtailment of Long Term rights and house-keeping changes to reflect the latest approved version of the Harmonised Allocation Rules.

Relevant Documents
Please find below the relevant documents which outline the proposed changes:

Consultation Invitation Letter (please read first)

Appendix 1 Rules for Forward Capacity Allocation (track marked)

Appendix 2 Long Term Nomination Rules (track marked)

Appendix 3 Rules for Day Ahead Capacity Allocation (track marked)

Appendix 4 Rules for Intraday Capacity Allocation (track marked)

We welcome all market participant and stakeholder comments or questions on the proposals by email to by 18:00 CET 31st May 2022.

If you have any questions, please contact the Customer Team.

Robot Inspects Nemo Link’s HVDC Converter Halls

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Nemo Link, Ross Robotics, Elia Group and Siemens Energy develop robots to inspect live HVDC converter halls

  • The use of robots in high-voltage direct current (HVDC) converter hall inspections will reduce the risks, time and costs associated with manual inspections
  • The development of robots which have electromagnetic compatibility (EMC) will allow inspections without the need to temporarily switch off the interconnector
Robot demonstration at the Nemo Link converter hall. Source: Ross Robotics.

HVDC technology facilitates the large-scale integration of renewables into the system, since it allows the efficient transportation of massive amounts of electricity over very long distances. Nemo Link’s assets include two HVDC converter halls, which, due to their electromagnetic fields, may need to be temporarily switched off for inspection and maintenance purposes.

The four partners are aiming to develop EMC autonomous robots, tailoring the modular platform of a robot developed by Ross Robotics so that it can be used in a converter hall environment. The collaboration will therefore see the creation of a new robot, which is fully compatible with electromagnetic fields and can operate autonomously. It will carry smart sensors and cameras, helping to detect potential issues, reduce the risk of unexpected outages and minimise downtime for ad hoc repair work. Ultimately, this will maximise both the operation time of converter halls and the continuous flow of renewables between Belgium and the UK.

Revised Planned Outage 2021

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Updated on 22/09/2021

We are pleased to confirm that the Nemo Link Interconnector will return to service on 24/09/2021 at 12:00 CEST as per the updated REMIT (see below) following its annual planned outage this week. Available capacity (subject to restrictions from the onshore TSOs) for delivery day 24/09/2021 from 12:00 CEST will be offered in the Nemo Link day-ahead auction on JAO which will run on 23/09/2021 from 09:00 to 09:30 CEST.


REMIT details

Outage type: Planned

Outage start: 2021-09-21  07:00:00 CET/CEST
Outage end: 2021-09-24  12:00:00 CET/CEST

New Generation capacity: 0
New Demand capacity: 0

Event status: Active
Message version: 6.0

Check the REMIT messages at:–00004R-ELXP-RMT-49033796/6/NEMO1–00004R-ELXP-RMT-20102840/6/NEMO1

If you have any questions, please do not hesitate to contact the Customer Team.


Updated on 18/09/2021

Please be advised that Nemo Link has changed the times and dates of its annual planned outage for 2021.  The outage will now commence a day later on Tuesday 21st September 2021 and run through Friday 24th  September 2021:


Start Time
Start Date
End Time
End Date
Interconnector Capacity
07:00 (CEST)
23:00 (CEST)
0 MW

 The changes to the programme were notified on the REMIT page of the BMREPORTS website. Please note that all timings are in GMT on the REMIT portal.

If you have any questions, please contact the Nemo Link Customer Team.


Nemo Link, safeguarding the future while preserving the past

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We hear more and more about the vital role of interconnectors in connecting to a Net Zero future but we’re not often told how the past can be rediscovered and preserved in the build of an interconnector… It’s the story of the Nemo Link Interconnector and the discovery of a mysterious 18th century cannon.

Discovery of the cannon

Pegwell Bay, the location of the Nemo Link connection point in England, is already famous in history as the landing site of Julius Caesar’s invading Roman army in 54BC.  Before construction, Nemo Link commissioned Wessex Archaeology to undertake a programme of specialist archaeological consultancy for the UK element of the marine cable route. The survey data relating to the cable route were assessed for archaeology, which identified ‘anomalies’ that could be damaged by, or cause damage, during the laying of the interconnector cables.

In 2016, a magnetic anomaly was identified during one of these surveys, off the Kent coast (South East England) that indicated buried metal material that could be of archaeological interest. The site was visually inspected the following year by marine archaeological experts using a Remotely Operated Vehicle (ROV) that identified it as a heavily concreted cannon. The object was recovered from the seabed and taken to Wessex Archaeology’s Coastal and Marine department in Salisbury, Wiltshire for further analysis.

Interesting features and findings to the gun’s history

When the cannon was lifted, it was covered in a thick ‘concretion’ of natural marine material which had built up on its surface over the centuries spent on the seabed.

The cannon’s lead apron, which covered the touch hole where the gun was lit, was still attached with retaining strings, suggesting that the gun was still in use when it was lost.

The cannon’s tampion – a wooden stopper used to close the muzzle of the gun barrel – was found sealing its bore, suggesting it could have been loaded at the time of its loss.

The shape and proportions of the cannon suggest it was cast to the ‘Borgard pattern’, meaning it is likely to have been cast between 1715 and 1727. Three pounder guns such as this one were often used as a defensive measure by merchant ships.

Relocation of the cannon

The Wessex Archaeology team have also helped Nemo Link design a bespoke display case for this interesting discovery to contribute to the cannon’s long-term preservation. The cannon is now installed in its custom case, made by conservation experts Armour Systems and showcased in our office at 35 Homer Road, Solihull, UK.

We are excited to showcase this piece of history while continuing to play our part in accelerating to a clean energy future.  Perhaps in 300 years a part of Nemo Link, our interconnector will also be proudly on display explaining how it enabled the sharing of renewable energy across Europe?

Request for Feedback: 30 Minute Intraday Product Design Options

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In line with the EU target model including an ambition to enable intraday cross-zonal capacity products of a duration less than the current one hour, Nemo Link are considering amending its intraday product from an hourly to an half-hourly product.

We have written a very short document with 3 possible design options and would be very grateful for your feedback.

If you have an interest in intraday trading on Nemo Link, please respond to this request for feedback via the Nemo Link’s mailbox ( by 30th July.

If you would like to discuss the proposal in detail or have any questions prior to submitting your feedback, please do not hesitate to get in touch.

Contact Us

Please get in touch if you would like to explore trading opportunities or discuss any matters related to Nemo Link.

Customer Engagement Partner, Michele Jordan
Correspondence Address Nemo Link Limited, Rue Joseph Stevens 7, 1000 BRUSSELS, Belgium

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