Leading service provider for Transmission System Operators (TSOs) in the European electricity market.

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-10-2026 00:00 - 01:00 1899 MW

07-10-2026 01:00 - 02:00 1899 MW

07-10-2026 02:00 - 03:00 1899 MW

07-10-2026 03:00 - 04:00 1899 MW

07-10-2026 04:00 - 05:00 1899 MW

07-10-2026 05:00 - 06:00 1899 MW

07-10-2026 06:00 - 07:00 1899 MW

07-10-2026 07:00 - 08:00 1899 MW

07-10-2026 08:00 - 09:00 1899 MW

07-10-2026 20:00 - 21:00 1899 MW

07-10-2026 21:00 - 22:00 1899 MW

07-10-2026 22:00 - 23:00 1899 MW

07-10-2026 23:00 - 24:00 1899 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 00:00 - 01:00 1566 MW

07-10-2026 01:00 - 02:00 1566 MW

07-10-2026 02:00 - 03:00 1566 MW

07-10-2026 03:00 - 04:00 1566 MW

07-10-2026 04:00 - 05:00 1566 MW

07-10-2026 05:00 - 06:00 1566 MW

07-10-2026 06:00 - 07:00 1566 MW

07-10-2026 07:00 - 08:00 1566 MW

07-10-2026 08:00 - 09:00 1566 MW

07-10-2026 20:00 - 21:00 1566 MW

07-10-2026 21:00 - 22:00 1566 MW

07-10-2026 22:00 - 23:00 1566 MW

07-10-2026 23:00 - 24:00 1566 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :

   07/10/2026

      00:00-01:00 MARSILLON AT761

      01:00-02:00 MARSILLON AT761

      02:00-03:00 MARSILLON AT761

      03:00-04:00 MARSILLON AT761

      04:00-05:00 MARSILLON AT761

      05:00-06:00 MARSILLON AT761

      06:00-07:00 MARSILLON AT761

      07:00-08:00 MARSILLON AT761

      08:00-09:00 MARSILLON AT761

      20:00-21:00 MARSILLON AT761

      21:00-22:00 MARSILLON AT761

      22:00-23:00 MARSILLON AT761

      23:00-24:00 MARSILLON AT761

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) ? :

   The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

1. TSO(s)*:

Nemo Link Limited

2. Identification of affected Long Term Transmission Rights:

NLL-GB-BE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-10-2026 11:00 - 12:00 724 MW

07-10-2026 12:00 - 13:00 724 MW

07-10-2026 13:00 - 14:00 724 MW

07-10-2026 14:00 - 15:00 724 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 11:00 - 12:00 0 MW

07-10-2026 12:00 - 13:00 0 MW

07-10-2026 13:00 - 14:00 0 MW

07-10-2026 14:00 - 15:00 0 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

This concerns a planned maintenance intervention on the Nemo Link installations.

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

This concerns a planned maintenance intervention on the Nemo Link installations.

1. TSO(s)*:

Nemo Link Limited

2. Identification of affected Long Term Transmission Rights:

NLL-BE-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-10-2026 11:00 - 12:00 725 MW

07-10-2026 12:00 - 13:00 725 MW

07-10-2026 13:00 - 14:00 725 MW

07-10-2026 14:00 - 15:00 725 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 11:00 - 12:00 0 MW

07-10-2026 12:00 - 13:00 0 MW

07-10-2026 13:00 - 14:00 0 MW

07-10-2026 14:00 - 15:00 0 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

This concerns a planned maintenance intervention on the Nemo Link installations.

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

This concerns a planned maintenance intervention on the Nemo Link installations.

1. TSO(s)*:

RTE, SWISSGRID

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment due to Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-10-2026 00:00 - 01:00 370 MW

07-10-2026 01:00 - 02:00 370 MW

07-10-2026 02:00 - 03:00 370 MW

07-10-2026 03:00 - 04:00 370 MW

07-10-2026 04:00 - 05:00 370 MW

07-10-2026 05:00 - 06:00 370 MW

07-10-2026 06:00 - 07:00 370 MW

07-10-2026 07:00 - 08:00 370 MW

07-10-2026 08:00 - 09:00 370 MW

07-10-2026 09:00 - 10:00 370 MW

07-10-2026 10:00 - 11:00 370 MW

07-10-2026 11:00 - 12:00 370 MW

07-10-2026 12:00 - 13:00 370 MW

07-10-2026 13:00 - 14:00 370 MW

07-10-2026 14:00 - 15:00 370 MW

07-10-2026 15:00 - 16:00 370 MW

07-10-2026 16:00 - 17:00 370 MW

07-10-2026 17:00 - 18:00 370 MW

07-10-2026 18:00 - 19:00 370 MW

07-10-2026 19:00 - 20:00 370 MW

07-10-2026 20:00 - 21:00 370 MW

07-10-2026 21:00 - 22:00 370 MW

07-10-2026 22:00 - 23:00 370 MW

07-10-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 00:00 - 01:00 0 MW

07-10-2026 01:00 - 02:00 0 MW

07-10-2026 02:00 - 03:00 0 MW

07-10-2026 03:00 - 04:00 0 MW

07-10-2026 04:00 - 05:00 0 MW

07-10-2026 05:00 - 06:00 0 MW

07-10-2026 06:00 - 07:00 0 MW

07-10-2026 07:00 - 08:00 0 MW

07-10-2026 08:00 - 09:00 0 MW

07-10-2026 09:00 - 10:00 0 MW

07-10-2026 10:00 - 11:00 0 MW

07-10-2026 11:00 - 12:00 0 MW

07-10-2026 12:00 - 13:00 0 MW

07-10-2026 13:00 - 14:00 0 MW

07-10-2026 14:00 - 15:00 0 MW

07-10-2026 15:00 - 16:00 0 MW

07-10-2026 16:00 - 17:00 0 MW

07-10-2026 17:00 - 18:00 0 MW

07-10-2026 18:00 - 19:00 0 MW

07-10-2026 19:00 - 20:00 0 MW

07-10-2026 20:00 - 21:00 0 MW

07-10-2026 21:00 - 22:00 0 MW

07-10-2026 22:00 - 23:00 0 MW

07-10-2026 23:00 - 24:00 0 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :

   07/10/2026

      00:00-01:00 Network Security

      01:00-02:00 Network Security

      02:00-03:00 Network Security

      03:00-04:00 Network Security

      04:00-05:00 Network Security

      05:00-06:00 Network Security

      06:00-07:00 Network Security

      07:00-08:00 Network Security

      08:00-09:00 Network Security

      09:00-10:00 Network Security

      10:00-11:00 Network Security

      11:00-12:00 Network Security

      12:00-13:00 Network Security

      13:00-14:00 Network Security

      14:00-15:00 Network Security

      15:00-16:00 Network Security

      16:00-17:00 Network Security

      17:00-18:00 Network Security

      18:00-19:00 Network Security

      19:00-20:00 Network Security

      20:00-21:00 Network Security

      21:00-22:00 Network Security

      22:00-23:00 Network Security

      23:00-24:00 Network Security

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) ? :

   The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-ME

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

07-10-2026 15:00 - 16:00 400 MW

07-10-2026 16:00 - 17:00 400 MW

07-10-2026 17:00 - 18:00 400 MW

07-10-2026 18:00 - 19:00 400 MW

07-10-2026 19:00 - 20:00 400 MW

07-10-2026 20:00 - 21:00 400 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 15:00 - 16:00 0 MW

07-10-2026 16:00 - 17:00 0 MW

07-10-2026 17:00 - 18:00 0 MW

07-10-2026 18:00 - 19:00 0 MW

07-10-2026 19:00 - 20:00 0 MW

07-10-2026 20:00 - 21:00 0 MW

6.          Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment *:

HVDC Monita

7.          Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

19-10-2026 00:00 - 01:00 1299 MW

19-10-2026 01:00 - 02:00 1299 MW

19-10-2026 02:00 - 03:00 1299 MW

19-10-2026 03:00 - 04:00 1299 MW

19-10-2026 04:00 - 05:00 1299 MW

19-10-2026 05:00 - 06:00 1299 MW

19-10-2026 06:00 - 07:00 1299 MW

19-10-2026 07:00 - 08:00 1299 MW

19-10-2026 08:00 - 09:00 1299 MW

19-10-2026 09:00 - 10:00 1299 MW

19-10-2026 10:00 - 11:00 1299 MW

19-10-2026 11:00 - 12:00 1299 MW

19-10-2026 12:00 - 13:00 1299 MW

19-10-2026 13:00 - 14:00 1299 MW

19-10-2026 14:00 - 15:00 1299 MW

19-10-2026 15:00 - 16:00 1299 MW

19-10-2026 16:00 - 17:00 1299 MW

19-10-2026 17:00 - 18:00 1299 MW

19-10-2026 18:00 - 19:00 1299 MW

19-10-2026 19:00 - 20:00 1299 MW

19-10-2026 20:00 - 21:00 1299 MW

19-10-2026 21:00 - 22:00 1299 MW

19-10-2026 22:00 - 23:00 1299 MW

19-10-2026 23:00 - 24:00 1299 MW

5. Amount of LTTR remaining after curtailment:

19-10-2026 00:00 - 01:00 957 MW

19-10-2026 01:00 - 02:00 957 MW

19-10-2026 02:00 - 03:00 957 MW

19-10-2026 03:00 - 04:00 957 MW

19-10-2026 04:00 - 05:00 957 MW

19-10-2026 05:00 - 06:00 957 MW

19-10-2026 06:00 - 07:00 957 MW

19-10-2026 07:00 - 08:00 957 MW

19-10-2026 08:00 - 09:00 957 MW

19-10-2026 09:00 - 10:00 957 MW

19-10-2026 10:00 - 11:00 957 MW

19-10-2026 11:00 - 12:00 957 MW

19-10-2026 12:00 - 13:00 957 MW

19-10-2026 13:00 - 14:00 957 MW

19-10-2026 14:00 - 15:00 957 MW

19-10-2026 15:00 - 16:00 957 MW

19-10-2026 16:00 - 17:00 957 MW

19-10-2026 17:00 - 18:00 957 MW

19-10-2026 18:00 - 19:00 957 MW

19-10-2026 19:00 - 20:00 957 MW

19-10-2026 20:00 - 21:00 957 MW

19-10-2026 21:00 - 22:00 957 MW

19-10-2026 22:00 - 23:00 957 MW

19-10-2026 23:00 - 24:00 957 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Dear Market Participants,

Following our previous communication from 30 of June 2026 we would like to provide you with an update regarding the go‑live timeline for the 15‑minute MTU and Block Bids implementation for auctions on the Swiss borders.

The intended implementation of the 15-minute MTU capacity allocation process is targeted for late Q1 2027. This timeline remains subject to ongoing discussions and confirmation by Market Participants, TSOs, and National Regulatory Authorities (NRAs) regarding the preferred implementation approach. In line with standard practice, an appropriate testing phase will also be provided to allow market participants sufficient time to prepare their systems and operational processes ahead of go-live.

Following consultations with market participants and discussions with TSOs, the proposed block bid solution has been significantly simplified. The revised design reflects the feedback received from stakeholders and aims to strike an appropriate balance between market needs, operational efficiency, and implementation complexity.

The simplified block bid solution will be implemented as part of the Orion auction platform and will therefore become available upon the deployment of that platform, which is currently not expected to go live before September 2027. 

The postponement of the JAO implementation was driven by a combination of unforeseen circumstances, project interdependencies, and extensive design discussions with Transmission System Operators (TSOs), including feedback received during consultations with market participants. These discussions have been instrumental in ensuring that the solution delivered meets stakeholder expectations and supports long-term market needs.

Using this opportunity, the Swiss border TSOs are inviting Market Participants to participate in a short follow-up survey regarding their preferred implementation approach. Please access the questionnaire via provided link: https://forms.cloud.microsoft/e/ncQEgf12MX

Please kindly be informed that we will collect the answers until 20/10/2026 EOD.

On behalf of the TSOs we thank you for your input.

Kind regards,

JAO Support Team