Our RIIO-T3 Business Plan

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We have a chance to shape a cleaner, greener future for us all

Publishing our next Transmission Business Plan (RIIO-T3) is a significant milestone for our transmission business and the journey to Net Zero, enabling a more sustainable future for us all. Watch this short video with Nicola Connelly, CEO of SP Energy Networks, to find out more about our plans and the positive impact they will make across Scotland and beyond.

£10.6 bn

We will invest £10.6 billion to upgrade and grow our transmission network in Central and Southern Scotland

Around 1,400

New jobs created directly and supporting over 11,000 jobs across Scotland and the UK in the long term

2035

This plan is a key step of our journey to become a Net Zero Networks Business by 2035

5 Years

On the journey to Net Zero, our plans outline our proposals for the 5 years from 2026 to 2031 (RIIO-T3 price control)

Read our Business Plan

We have published a 100-page Business Plan accompanied by a suite of supporting documents including annexes and data templates.

Read our Business Plan

Timeline

RIIO-T3 Business Plan Submission
11 December 2024

Ofgem Final Determination (FD)
Expected Q4 2025

Ofgem Sector Specific
Methodology Consultation (SSMC)
December 2023 to March 2024

Ofgem Call for
Evidence window closes
10 February 2025

Stakeholder Engagement
Ongoing

Ofgem Call for
Evidence window opens
18 December 2024

RIIO-T3 Business Plan
delivery period begins
April 2026

Ofgem Sector Specific
Methodology Decision (SSMD)
July 2024

Ofgem Draft
Determination (DD)
Expected June/July 2025

Have your say

We want to know your views so we can deliver the best plan possible. Our online survey and Ofgem's 'Call for Evidence' were live from 18 December 2024 to 10 February 2025. Thank you to everyone who participated. Please register as a stakeholder to be informed of future engagement opportunities.

Independent Stakeholder Group Visitation

Find out more about our Independent Stakeholder Group (ISG)

Our Independent Net Zero Advisory Group (INZAC) acted as the Independent Stakeholder Group (ISG) for our RIIO-T3 Business Plan. The group worked closely with teams, scrutinising both the technical plans as well as ensuring any emerging customer issues are fully considered.

Find out more about our INZAC