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Our RIIO-T3 Business Plan

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. 

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£10.6 bn

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

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Around 1,400

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

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2035

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

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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
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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 Specfic
Methogolody Decision (SSMD)
July 2024

 
 
 

Ofgem Draft
Determination (DD)
Expected June/July 2025

 
 

Ongoing

Business Plan Development and Stakeholder Engagement Ongoing

December 2023 to March 2024

Ofgem Sector Specific Methodology Consultation (SSMC)

July 2024

Ofgem Sector Specific Methodology Decision (SSMD)

Eleventh of December 2024

RIIO-T3 Business Plan Submission

Eighteenth of December 2024

Ofgem Call for Evidence window opens

Tenth of February 2025

Ofgem Call for Evidence window closes

Expected June/July 2025

Ofgem Draft Determination (DD)

Expected Q4 2025

Ofgem Final Determination (FD)

April 2026

RIIO-T3 Business Plan delivery period begins


Have your say

Have your say

We want to know your views so we can deliver the best plan possible. Submit feedback via our online survey or take part in Ofgem's 'Call for Evidence' from 18 December 2024 to 10 February 2025.

We will also be hosting a public RIIO-T3 webinar on 21 January 2025. Find out more and register to attend.

Ofgem's Call for Evidence (live from 18 Dec)   

Provide feedback via our online survey


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

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 Videos

We have created a suite of explainer videos to help you find out more about our business plan:

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Blogs

In the lead up to publication, we shared a series of blog posts talking about the journey of developing our plan.

 
SP Energy Networks, RIIO-T3 Business Plan Blog. This is how we empower our communities. Jillian Violaris, Partnership & Funding Manager

27/02/2024

Empowering our Communities

By Jillian Violaris

This blog discussed how we support our communities in realising their low carbon ambitions, ensuring no one is left behind on the journey to Net Zero. 

Contact us

Please get in touch if you have any enquiries about our RIIO-T3 Business Plan

Email

 

Hi! I'm the SP Energy Networks System Agent, can I help you?