REG - SSE Plc - SSENT response to RIIO-T3 Final Determination

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RNS Number : 2460K  SSE PLC  04 December 2025

SSEN Transmission responds to Ofgem's RIIO-T3 Final Determination

SSEN Transmission notes the publication of Ofgem's Final Determination for the
RIIO-T3 price control period, which comes at a critical time for securing
clean, affordable power for families and businesses across the country.

The investment it delivers will help reduce reliance on imported energy from
overseas, remove grid bottlenecks and strengthen energy security, as well as
acting as a major catalyst for economic growth, jobs and supply chain
investments across the UK to unlock the country's full potential.

Based on an initial assessment, SSEN Transmission welcomes improvements to
baseline total expenditure and notes the updates to Ofgem's proposed financial
parameters and incentive regime. However, a detailed assessment is required to
determine the overall investability of the package.

With more material to be released by Ofgem over the next few days, SSEN
Transmission will review and assess the price control package in its entirety
over the coming weeks, including the proposed licence changes due to be
consulted upon shortly.

SSEN Transmission remains committed to constructive engagement with Ofgem to
secure an investible, financeable and ambitious price control settlement which
underpins the unprecedented levels of investment required to deliver clean
power, energy security and lower bills for current and future generations.

Notes

·    The RIIO-T3 Price Control period runs from April 2026 - March 2031
and is part of Ofgem's regulatory framework aimed at ensuring energy network
companies have enough revenue to invest in maintaining and improving their
networks.

SSEN Transmission's dedicated Business Plan website:

www.ssen-transmission.co.uk/RIIO-T3
(http://www.ssen-transmission.co.uk/RIIO-T3)

About SSEN Transmission

·    Headquartered in Perth - with offices
in Aberdeen, Inverness and Glasgow - SSEN Transmission is responsible for
the electricity transmission network in the north of Scotland, investing in
and maintaining the high voltage 132kV, 220kV, 275kV and 400kV electricity
transmission network.

·    SSEN Transmission's strategic objective is to enable the transition
to a low carbon economy, helping to secure the country's clean power and
energy security ambitions. It does this by building the electricity
transmission network infrastructure required to connect and transport
renewable electricity in the north of Scotland to the towns, villages and
cities where it's needed, as it delivers a network for net zero emissions.

·    SSEN Transmission is owned 75% by SSE plc and 25% by Ontario
Teachers' Pension Plan Board (Ontario Teachers').

·    Learn more about SSEN Transmission by
visiting www.ssen-transmission.co.uk (http://www.ssen-transmission.co.uk/)
, X (https://twitter.com/SSETransmission) , LinkedIn
(https://www.linkedin.com/company/ssen-transmission/)  or Instagram
(https://www.instagram.com/ssentransmission/) .

 

 Enquiries
 Investors   SSE Investor Relations  ir@sse.com     Michael Livingston  +44 (0)345 0760 530
 Media       SSE Media               media@sse.com  Greg Clarke         +44 (0)345 0760 530

 

 

 

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