RIIO-T3 DocumentsRead our Business PlanThis is the full 100-page Business PlanDownload our planSupporting documentsWe have published a suite of supporting documents including Annexes, Business Plan Data Templates (BPDT), Engineering Justification Papers (EJP) and additional documents including expert reports. View our Statement on redactions. AnnexesAnnexesAssurance StatementDownload Assurance Statement Climate Resilience StrategyDownload Climate Resilience StrategyCost Assessment and Benchmarking ApproachDownload Cost Assessment and Benchmarking Approach Environmental Action PlanDownload Environmental Action Plan ET Load StrategyDownload ET Load Strategy Finance AnnexDownload Finance AnnexInnovation StrategyDownload Innovation Strategy IT & Telecoms StrategyDownload IT & Telecoms StrategyNetwork Asset Management StrategyDownload Network Asset Management StrategyStatement from ISG ChairDownload Statement from ISG ChairStakeholder Engagement & Decision LogDownload Stakeholder Engagement & Decision LogWorkforce & Supply-Chain Resilience StrategyDownload Workforce & Supply-Chain Resilience StrategyData TemplatesBusiness Plan Data Templates (BPDT)Business Plan Data Templates (BPDT)Download Business Plan Data TemplatesNetwork Asset Risk Metric (NARM) BPDTDownload NARM BPDT NARM CommentaryDownload NARM CommentaryEngineering Justification PapersEngineering Justification Papers (EJPs)Load - Restoration EJPDownload Restoration EJP Load - Glenmuckloch to ZV Route ReinforcementsDownload Glenmuckloch EJPLoad - Glenshimmeroch 132kV Collector Substation ReinforcementsDownload Glenshimmeroch EJP Load - Glenglass to Glenmuckloch 132kV OHLDownload Glenglass EJPLoad - Redshaw Cluster ReinforcementsDownload Redshaw Cluster EJPLoad - Wyseby 400kV substationDownload Wyseby EJPLoad - U & AT Route 132kV ReplacementDownload U&AT Route EJP Load - Killoch 400kV SubstationDownload Killoch EJPLoad - Teviot 400kV & 132kV substationDownload Teviot EJPLoad - Windyhill – Lambhill - Denny North 400kV Reinforcement (DLUP) Download Windyhill EJPLoad - Strathaven - Elvanfoot OHL Uprating Works (VERE)Download Strathaven EJPLoad - Dumfries North 400kV substationDownload Dumfries North EJPLoad - Coylton -Maybole 132kV ReinforcementDownload Coylton EJPLoad - New Cumnock North 400kV substationDownload New Cumnock North EJPLoad - Gala North 400/132kV substationDownload Gala North EJPLoad - Carrick 275kV substationDownload Carrick EJPLoad - Denny to Braco Uprating (BDUP)Download BDUP EJPLoad - Elvanfoot - Harker 400kV OHL Uprating Works (EHRE)Download Elvanfoot Harker EJPLoad - Holmhill 132kV substationDownload Holmhill EJPLoad - Mark Hill Harmonic Mitigation WorksDownload Mark Hill EJPLoad - Coalburn Harmonic FilterDownload Coalburn EJPLoad - Transmission Upgrade – Distribution Restoration ZonesDownload Transmission Upgrade EJPLoad - Currie GSPDownload Currie EJPLoad - Non-load - Environmental Civil Asset UpgradesDownload Environmental Civil Asset Upgrades EJPNon-load - Building Energy UsageDownload Building Energy Usage EJPNon-load - Series Compensation Control Scheme ModernisationDownload Series Compensation EJPNon-load - RIIO-T3 System Monitoring ModernisationDownload System Monitoring EJPNon-load - Westfield 132kV Switchgear ReplacementDownload Westfield EJPNon-operational Property InvestmentDownload Non-operational Property Investment EJPFleet InvestmentDownload Fleet Investment EJPAdditional documentsAdditional documentsEconomic Insight Ensuring A Reliable Approach To Notional FinanceabilityDownload Economic Insight Ensuring A Reliable Approach To Notional FinanceabilityFrontier Economics Updated Cost of Equity Cross-check EvidenceDownload Frontier Economics Updated Cost of Equity Cross-check EvidenceNERA Financeability Analysis for SP Transmission over RIIO-T3 – DeterministicDownload NERA Financeability Analysis for SP Transmission over RIIO-T3 – DeterministicNERA Financeability Analysis for SP Transmission over RIIO-T3 – StochasticDownload NERA Financeability Analysis for SP Transmission over RIIO-T3 – StochasticNERA Cost of Debt ReportDownload NERA Cost of Debt ReportNERA SPT Additional Cost of Borrowing for the RIIO-3 Price ControlDownload NERA SPT Additional Cost of Borrowing for the RIIO-3 Price ControlNERA Cost of Equity for RIIO-T3Download NERA Cost of Equity for RIIO-T3Oxera RIIO-3 Risks and Investability TopicsDownload Oxera RIIO-3 Risks and Investability TopicsOxera Evaluation of the ARP-DRP FrameworkDownload Oxera Evaluation of the ARP-DRP FrameworkOxera Ongoing Efficiency and Real Price EffectsDownload Oxera Ongoing Efficiency and Real Price EffectsOxera RIIO-3 Cost of Equity—CAPM ParametersDownload Oxera RIIO-3 Cost of Equity—CAPM ParametersS&C Electric - RIIO-T3 Relative Risk AssessmentDownload S&C Electric - RIIO-T3 Relative Risk AssessmentHave your sayWe 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 surveyFind 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 VideosWe have created a suite of explainer videos to help you find out more about our business plan:Explainer video - Investing in our network now to meet current and future needsExplainer video - Developing strategic projects to upgrade and expand our networkExplainer video - Creating an agile, resilient delivery capabilityExplainer video - Listening to our communities and stakeholdersExplainer video - Our commitment to being a responsible, sustainable businessExplainer video - Delivering value through our plan BlogsIn the lead up to publication, we shared a series of blog posts talking about the journey of developing our plan. 27/02/2024Empowering our CommunitiesBy Jillian ViolarisThis 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. 21/02/2024Introducing our next Transmission Business PlanBy Andrew Stanger28/03/2024Ensuring Regulation & Policy is fit for a Net Zero worldBy David Boyland29/04/2024Digitalise to DecarboniseBy Lynda Ward05/06/2024Delivering a more sustainable networkBy Lauren McCarthy26/06/2024Q&A with Angela Love, Chair of INZACBy Angela Love25/07/2024Connecting our electric futureBy Craig McTaggart03/09/2024How we ensure a secure and resilient energy supplyBy Allan Holton03/10/2024Securing our future by building resilience to cyber threatsBy Euan Birch06/11/2024Unleashing the full potential of our workforceBy Jennifer Davies18/11/2024This is how we will deliver our next Transmission Business PlanBy Nicol Gray27/22/2024Becoming a Data-Driven organisationBy Kirsty Scott04/11/2024Using innovation to accelerate industry-leading energy solutionsBy Edward MulhollandContact usPlease get in touch if you have any enquiries about our RIIO-T3 Business PlanEmail
27/02/2024Empowering our CommunitiesBy Jillian ViolarisThis 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.
