Consultation on SONI’S draft Transmission Development Plan 2025-2034

The Utility Regulator has published a consultation paper on SONI’s draft Transmission Development Plan for Northern Ireland (TDPNI) 2025-2034, which sets out proposals for the development of Northern Ireland’s transmission network and interconnection over the coming 10 years. 

The Development Plan presents projects that are expected to be needed for the operation of the electricity transmission network in the short and medium-term.

Projects within the plan have been identified as new builds, uprate/modify, refurbish/replace or a combination of transmission network reinforcements, asset replacement projects and details the project drivers for investment. 

The plan details the transmission projects within each specific planning area within Northern Ireland - North and West, and South and East. 

The plan has been prepared in accordance with Condition 40 of SONI’s license. 

We welcome all views on any aspect of the Transmission Development Plan for Northern Ireland.

Responses to the consultation, preferably in electronic format, should be sent to Jody.Oboyle@uregni.gov.uk and SONIUREGNI@uregni.gov.uk by 5.00pm on 1 May 2026.

Additional information

• Copies of all documents will be made available in large print, Braille, audio cassette and a variety of relevant minority languages if required.
• Your response may be made public by the Utility Regulator. If you do not want all or part of your response or name made public, please state this clearly in the response by marking your response as ‘CONFIDENTIAL’.
• If you want other information that you provide to be treated as confidential, please be aware that, under the Freedom of Information Act 2000 (FOIA), there is a statutory Code of Practice with which public authorities must comply and which deals, amongst other things, with obligations of confidence. In view of this, it would be helpful if you could explain to us why you regard the information you have provided as confidential.
• Information provided in response to this consultation, including personal information, may be subject to publication or disclosure in accordance with the access to information regimes (these are primarily the FOIA and the Data Protection Act 2018 (DPA)).
• As stated in the GDPR Privacy Statement for consumers and stakeholders, any personal data contained within your response will be deleted once the matter being consulted on has been concluded though the substance of the response may be retained. 

Ways to respond