Publications

Northern Ireland Gas Transmission Outlook (NI GTO) 2025/26

This is the inaugural version of the Northern Ireland Gas Transmission Outlook (NI GTO) which is published in accordance with condition 2.13 (Network Forecasts) of the TSO’s gas conveyance licences. The NI GTO provides a ten-year outlook of transmission network requirements and replaces the previous Northern Ireland Gas Capacity Statement (NI GCS)

Mutual Energy Limited (MEL) and GNI (UK) Limited, working together through the Gas Market Operator for Northern Ireland (GMO NI), are responsible for gas transmission network planning in Northern Ireland. As the energy system evolves, planning must adapt.

The Climate Change Act (Northern Ireland) 2022 sets legally binding targets, including net zero emissions by 2050 and at least 80% renewable electricity by 2030. Delivering the energy transition requires coordination across all energy systems and therefore it is important that gas network operators work collaboratively with SONI to align planning where appropriate to support the efficient development of future energy infrastructure.

The NI GTO will continue to evolve, supporting informed decision-making and confidence in the transition to net zero.

The NI GTO 2025-26, along with previous editions of the Northern Ireland Gas Capacity Statement are available below.

Northern Ireland Gas Transmission Outlook (NI GTO) 2025/26

Previous Publications

Incremental Capacity

The incremental process comprises several phases, each with specific requirements that must be met before an incremental project can be initiated and new capacity developed.

This process takes place at least every odd-numbered year and begins with the demand assessment phase. This phase starts with a market demand assessment conducted by the Transmission System Operators following the annual yearly capacity auction. GMO NI will administer this stage on behalf of Premier Transmission Limited for the Moffat Interconnection Point and on behalf of GNI(UK) Limited for the South North Interconnection Point.

In accordance with section 4.2 of the NI Network Gas Transmission Code, Shippers are invited to submit Non-Binding Demand Indications (NBDIs) for Incremental Capacity using the template provided below. The template also outlines the applicable submission fees.

To date, no NBDIs have been received for either Interconnection Point during previous application windows. For further information, please refer to the relevant Market Demand Assessment Report.

NON-BINDING DEMAND INDICATION FOR INCREMENTAL CAPACITY TEMPLATE (2025)

Market Demand Assessment Reports

Data Publications

PUBLICATIONS ACCORDING TO SCHEDULE 3 OF SI NO. 534 THE ELECTRICITY AND GAS (MARKET IN-TEGRITY AND TRANSPARENCY) (AMENDMENT) (EU EXIT) REGULATIONS 2019

Statutory Instrument No. 534 on conditions for access to the natural gas transmission networks stipulates Transmission system operators (TSOs) to publish information regarding the services they offer and the relevant conditions applied, together with technical, tariff and operational information necessary for network users to gain effective network access. GMO NI has implemented the harmonised template containing the information required by Schedule 3 of SI No. 534.

PUBLICATIONS ACCORDING TO SCHEDULE 5 OF SI NO. 531 THE GAS (SECURITY OF SUPPLY AND NETWORK CODES (AMENDMENT) (EU EXIT) REGULATIONS 2019

Statutory Instrument No. 531 establishes a network code on harmonised transmission tariff structures for gas. GMO NI has implemented the harmonised template containing the information required by Schedule 5 of SI No. 531.

Standardised table

Transparency Data

All fundamental data from 1st October 2013 onwards is published in accordance with the Transparency Guidelines under Schedule 3 of SI No. 543 The Electricity and Gas (Market Integrity and Transparency) (Amendment) (EU Exit) Regulations 2019.

https://transparency.entsog.eu/

CAM NC Auction Calendars

Cam NC Auction Calendar 2026-27

Previous CAM NC Auction Calendars

Assessments of Market Demand

Under both EU and UK law Transmission System Operators (“TSOs”) must endeavour to enable permanent physical capacity to transport gas in both directions ‘bi-directional capacity’, or ‘Physical Reverse Flow’ (“PRF’’) on all interconnections / Interconnection Points (“IP"), except where an exemption from that obligation has been granted from the relevant authorities, after detailed assessment and after consulting in accordance with legislative requirements.

PTL, GNI(UK) and National Gas have therefore published this Market Assessment consultation paper to enquire of the market as to the potential demand(s) for bi-directional capacity at Moffat, such that the TSOs can subsequently discharge their obligations in accordance with the relevant legislation. Respondents are invited to respond via the included questionnaire by the 22nd of July 2026.

Bi-Directional Capacity at Moffat - IP Assessment of Market Demand

For information please also see the below link to a parallel assessment being conducted by GNI and GNI(UK) in respect of the Gormanston IP.

Gormanston Assessment

Previous Publications

Market Demand Assessment Reports

Previous CAM NC Auction Calendars

Assessments of Market Demand

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