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Download our RIIO-T3 Business Plan
Download our RIIO-T3 Business Plan
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    Learn more about our plan for 2026 - 2031

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    Reopeners

    Under the RIIO‑T3 price control, Reopeners are a regulatory mechanism set by Ofgem that allow electricity transmission companies to request changes to their allowed funding where specific, predefined uncertainties arise during the price control period.

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    Ofgem's Final Determination

    On 4th of December 2025, Ofgem published their final determination of our business plan

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    We hosted a series of webinars that were based on our analysis of the Ofgem Final Determination of our business plan. We shared our view of the implications of Ofgem’s decision.

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    Ofgem's Draft Determination

    On 1st of July 2025, Ofgem published their draft determination of our business plan

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    On 27th of August 2025, NGET has responded to the draft determination

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    A regional view of our plan

    Our Regional Reports

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    East Anglia Regional Business Plan

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    Midlands Regional Business Plan

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    Northeast Regional Business Plan

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    London Regional Business Plan

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    Southeast Regional Business Plan

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    Southwest Regional Business Plan

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    Wales Regional Business Plan

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    Infrastructure fit for a low-cost transition to net zero

    In this section, we outline the commitments and investments that support the first of Ofgem’s four Consumer Outcomes: infrastructure fit for a low-cost transition to net zero. This includes how we will increase the capacity of the system, accelerate connections for our customers and protect and improve the environment.

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    Secure and Resilient Supplies

    In this section, we outline the commitments and investments that support Ofgem’s second consumer outcome: Secure and resilient supplies. This includes how we will maintain our assets during a growth phase, transform our operations to manage a net zero power system and ensure the resilience of our network, supply chain and workforce.

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    High Quality of Service from regulated firms

    In this section, we outline the commitments and investments to support Ofgem’s third Consumer Outcome: high quality of service from regulated firms. This includes how we will improve the experience for our customers connecting to our network, make a positive contribution to our communities and consumers, mitigate the visual impacts of our network and invest in and deploy innovation.

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    Long term value for money

    In this section we outline our contribution to delivering Ofgem’s fourth Consumer Outcome: long-term value for money. This includes outlining how we will ensure our costs are efficient, our contribution to supporting economic growth, our digitalisation and data strategy, our information technology and telecommunications investments and the regulatory framework to support long term value for money.

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    Cost and financeability

    In this section we set out the overall cost of our plan and the financial framework for RIIO-T3. We also explain our approach to ensuring we are able to finance our business, our evidence for the regulatory framework and rate of return necessary to attract investment.

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    Supporting documents

    Regional Reports, Annexes and High Level Summaries

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    Webinars

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