Document library
You’ll find all of our publications, legal documents and key business reports here.
NGN & You
Corporate responsibility
RIIO-GD2 Reports
RIIO GD2 Draft Determination Response
NGN RIIO2 Draft Determination Core Consultation Response
NGN RIIO2 DD Response Letter
RIIO2 DD Annex Consultation Response
RIIO2 DD NARM Annex Response
RIIO2 DD GD Annex Response
RIIO2 DD Finance Annexe Response
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- Additional Costs Borrowing and Inflation
- ARP-DRP - Oxera
- CoE - Oxera
- ER vs AR - Frontier Economics
- Information Asymmetry and the Calibration of Price Controls - Frontier Economics
- NGN Outperformance Wedge - Frontier Economics
- Oxera 2019, Assessment of political and regulatory risk, prepared for National Grid Group 4 March
- Oxera (2019), Estimating RPI - adjusted equity market returns, 2 August
- Oxera (2019), Review of RIIO-2 finance issues, the estimation of beta and gearing', March
- Oxera (2019), Risk Premium on assets relative to debt', 25 March
- Oxera (2019) 'Review of RIIO2 fianance issues Rates of return used in investment managers' 6 March
- Oxera (2020), 'Is aiming up on the WACC be beneficial to customers', prepared for Heathrow Airport, 7 April
- Oxera (2020), 'Are sovereign yields the risk free rate for the CAPM', prepared for the ENA, 20 May
- Oxera (2020) 'Estimating debt beta for regulated utilities' 4 June
- Oxera (2020), 'What explains the equity market valuations of listed water companies' 20 May
- Oxera (2020) 'Response to the CMA on estimating RPI adjusted equity market returns' prepared for Heathrow Airport, 15 April
- RIIO2 frontier production growth - First Economics
RIIO-GD2 Business Plan (2021 - 2026)
Executive Summary
Business Plan
Customer Engagement Group Report
Customer Engagement Group Impacts Appendices 28
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- Business Plan Data Tables
- Business Plan Commentary
- NARMs Business Plan Data Tables
- NARMs Business Plan Commentary
- MRPS Data Table's (4.10)
- RIIO-2 Snapshot Tables
- NGN LiMo GD2 20191107 d4.1 (Ofgem)
- NGN LiMo GD2 20191107 d4.1 (NGN)
- NGN Domestic Customer Bill Calculation
- NGN's Business Plan Financial Parameters and Credit Rating Calculator
- NGN RIIO GD2 Business Plan - Irregular Submission Report
- CCG, 'You said, We did'
- NGN RIIO GD2 - Statement of Exclusions / Redactions
- A1 - NGN RIIO-2 Ofgem Guidance Checklist and Signposting
- A2 - NGN RIIO-2 Business Plan Assurance
- A3 - NGN RIIO-2 Stakeholder Engagement Strategy
- A4 - NGN RIIO-2 Stakeholder Engagement Insights
- A5 - NGN RIIO-2 Stakeholder Engagement Benchmarking
- A6 - NGN RIIO-2 Outputs
- A7 - NGN RIIO-2 Vulnerability Strategy
- A8 - NGN RIIO-2 Environmental Action Plan
- A9 - NGN RIIO-2 NTS Interactions
- A10 - NGN RIIO-2 Workforce Resilience Strategy
- A11 - NGN RIIO-2 IT and Cyber Security Plan
- A12 - NGN RIIO-2 Digitalisation Strategy
- A13 - NGN RIIO-2 Consumer Value Proposition
- A14 - NGN RIIO-2 Our Whole Systems Strategy
- A15 - NGN RIIO-2 Uncertainty and Risk
- A16 - NGN RIIO-2 Economic Outlook
- A17 - NGN RIIO-2 Long Term Development Statement
- A18 - NGN RIIO-2 Innovation Delivery Strategy
- A19 - NGN RIIO-2 Real Price Effects for Gas Networks
- A20 - NGN RIIO-2 Ongoing Efficiency for Gas Networks
- A21 - NGN RIIO-2 Regional factors
- A22 - NGN RIIO-2 Business Support Benchmarking
- A23 - NGN RIIO-2 Investment Decision Packs - Overview
- A24 - NGN RIIO-2 Cost Confidence Review
- A25 - NGN RIIO-2 Gas Holder Strategy
- A26 - NGN RIIO-2 Assessment of a Comfortable Investment Grade Credit Rating
- A27 - NGN RIIO-2 Review of NGN’s RIIO-2 Business Plan Financiability
- A28 - NGN RIIO-2 Review of NGN's Financial Analysis for RIIO-GD2
- A29 - NGN RIIO-2 Cost of Debt in RIIOGD2 - A report prepared for NGN
- A30 - NGN RIIO-2 Cost of Debt at RIIO-2 - A report for Gas Distribution Networks
- A31 - NGN RIIO-2 Outperformance Wedge
- A32 - NGN RIIO-2 The Cost of Equity for RIIO2 - Q4 2019 update
- A33 - NGN RIIO-2 Proposed Financial Package for RIIO-2
- A34 - NGN RIIO-2 Halo Effect and Additional Costs of Borrowing at RIIO-2
- A35 - NGN RIIO-2 Business Plan V2 to Final High Level Changes
- A36 - NGN RIIO-2 Full List of Documents
- A37 - NGN RIIO-2 Proposed Allowances
- A38 - NGN RIIO-2 Expenditure Programme - List of Proposed Investments
- A23.A - NGN RIIO-2 Investment Decision Pack - Pressure Reduction Stations - CBA
- A23.A - NGN RIIO-2 Investment Decision Pack - Pressure Reduction Stations - EJP
- A23.A - NGN RIIO-2 Investment Decision Pack - Pressure Reduction Stations (Preheating) - CBA
- A23.A - NGN RIIO-2 Investment Decision Pack - Pressure Reduction Stations (Pressure Control) - CBA
- A23.B - NGN RIIO-2 Investment Decision Pack - Offtakes - CBA
- A23.B - NGN RIIO-2 Investment Decision Pack - Offtakes - EJP
- A23.B - NGN RIIO-2 Investment Decision Pack - Offtakes (Metering) - CBA
- A23.B - NGN RIIO-2 Investment Decision Pack - Offtakes (Odourant) - CBA
- A23.B - NGN RIIO-2 Investment Decision Pack - Offtakes (Preheating) - CBA
- A23.B - NGN RIIO-2 Investment Decision Pack - Offtakes (Pressure Control) - CBA
- A23.C - NGN RIIO-2 Investment Decision Pack - Local Transmission System - CBA
- A23.C - NGN RIIO-2 Investment Decision Pack - Local Transmission System - EJB
- A23.D - NGN RIIO-2 Investment Decision Pack - Connections - EJP
- A23.E - NGN RIIO-2 Investment Decision Pack - Reinforcement - EJP
- A23.F - NGN RIIO-2 Investment Decision Pack - TransPennine - CBA
- A23.F - NGN RIIO-2 Investment Decision Pack - TransPennine - EJP
- A23.G - NGN RIIO-2 Investment Decision Pack - Overcrossings - CBA
- A23.G - NGN RIIO-2 Investment Decision Pack - Overcrossings - EJP
- A23.H - NGN RIIO-2 Investment Decision Pack - Governors - CBA
- A23.H - NGN RIIO-2 Investment Decision Pack - Governors - EJP
- A23.I - NGN RIIO-2 Investment Decision Pack - Pressure Management - CBA
- A23.I - NGN RIIO-2 Investment Decision Pack - Pressure Management - EJP
- A23.I - NGN RIIO-2 Investment Decision Pack - Pressure Management (Net-Zero) - CBA
- A23.J - NGN RIIO-2 Investment Decision Pack - Technology and Systems - EJP
- A23.J - NGN RIIO-2 Investment Decision Pack - Technology and Systems (Cyber Security) - CBA
- A23.J - NGN RIIO-2 Investment Decision Pack - Technology and Systems (Hardware) - CBA
- A23.J - NGN RIIO-2 Investment Decision Pack - Technology and Systems (Innovation) - CBA
- A23.J - NGN RIIO-2 Investment Decision Pack - Technology and Systems (Software) - CBA
- A23.K - NGN RIIO-2 Investment Decision Pack - Operational Vehicles - CBA
- A23.K - NGN RIIO-2 Investment Decision Pack - Operational Vehicles - EJP
- A23.L - NGN RIIO-2 Investment Decision Pack - Gas Holder Demolition - CBA
- A23.L - NGN RIIO-2 Investment Decision Pack - Gas Holder Demolition - EJP
- A23.M - NGN RIIO-2 Investment Decision Pack - Mandatory Repex - EJP
- A23.M - NGN RIIO-2 Investment Decision Pack - Mandatory Repex (Stubbbs) - CBA
- A23.M - NGN RIIO-2 Investment Decision Pack - Mandatory Repex (PRE Services) - CBA
- A23.M - NGN RIIO-2 Investment Decision Pack - Mandatory Repex (Mains) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex - EJP
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Above 2" Steel) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Above 2" Steel Net-Zero Sensitivity) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Diversions) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Overcrossings) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (PE) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Phoenix) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Risers) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Tier 2 B) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Tier 2 B Net-Zero Sensitivity) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Tier 3) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Tier 3 Net-Zero Sensitivity) - CBA
- A23.N - NGN RIIO-2 Investment Decision Pack - Non-Mandatory Repex (Zero Scoring) - CBA
RIIO-GD1 Reports
RIIO-GD1 Year 8 Report
RIIO-GD1 Year 8 Section 2 Tables
Archive
- RIIO-GD1 Year 7 Report
- RIIO-GD1 Year 7 Tables
- RIIO-GD1 Year 5 Report
- RIIO Year 5 Section 2 Tables
- RIIO-GD1 Year 4 Report
- RIIO Year 4 Section 2 Tables
- RIIO-GD1 Year 3 Report
- RIIO-GD1 Year 3 Section 2 tables
- RIIO-GDI Year 2 Report
- RIIO-GD1 Year 2 Section 2 tables
- RIIO-GDI Year 1 Report
- RIIO-GD1 Year 1 Section 2 tables
RIIO-GD1 Business Plan (2012 - 2021)
Executive summary
Business plan
More
- Appendix-1-ENA-Gas-Future-Scenarios-Report1
- Appendix2-TPA-Report-on-Medium-Term-Economic-Outlook
- Appendix3-Benchmarking-Matrix
- Appendix4-Innovation-Projects
- Appendix5-Stakeholder-Engagement
- Appendix6-EC-Harris-Report-on-Real-Price-Effects
- Appendix7-First-Economics-Report-on-Productivity
- Appendix8-Expenditure-Forecast-Plan-and-Table-Reconciliation
- Appendix10-Repex-Tier-2-Risk-Threshold-Methodology
- Appendix12-NTS-NGN-Capacity-Interaction
- Appendix13-What-is-the-Cost-of-Equity-for-RIIO-T1-and-RIIO-GD1
- Appendix14-Cash-Flow-Betas-and-Cost-of-Equity
- Appendix15-Debt-indexation-and-allowed-returns
- Appendix16-Long-Term-Equity-Returns
- Appendix17-Uncertainty-and-Risk
- Appendix18-Regional-Factors
- Appendix19B-Asset-Integrity-Assessment-Methodology
- Appendix-19C-NGN-RIIO-GD1-Network-Integrity-Capex1
- Appendix19E-Programme-Investment-Repex-Delivery
- Appendix19F-NGN-Innovation-Strategy-Benefits
- Appendix20-Regional-Economic-Impacts
- Appendix-21-IQI-NGN-Proposal
- Customer Engagement Group Report to OFGEM on NGN RIIO-2 Business Plan
- Customer Engagement Group Impacts Appendix 28
Gender Pay Reports
Group Strategies
Fraud and Whistleblowing Policy
Northern Gas Networks Pension Scheme
Northern Gas Networks Code of Conduct
Supplier Code of Conduct
Safe & reliable
Exit Capacity Planning Methodology Statement
Exit Capacity Planning Guidance: Methodology Consultation Report
Exit Capacity Planning Guidance Annual Report
Distribution System Management Principles Statement
Carbon Monoxide Detection
Gas Illegally Taken
Capacity Management Services Annual Report
Uniform Network Code
Business Separation
Transportation Independence Statement
Keeping costs down
Sustainable Procurement Strategy
Regulatory Financial Performance Report
Statutory Accounts
Northern Gas Networks Holdings Limited Annual Report and Accounts 2022-23
Northern Gas Networks Finance Annual Report and Accounts 2022-23
Northern Gas Networks Annual Report and Accounts 2022-23
Northern Gas Networks Operations Limited Annual Report and Accounts 2022-23
Archive
- Northern Gas Networks Holdings Limited Annual Report and Accounts 2022
- Northern Gas Networks Limited Annual Report and Accounts 2022
- Northern Gas Networks Operations Ltd Annual Report and Accounts 2022
- Northern Gas Networks Finance plc Annual Report and Accounts 2022
- Northern Gas Networks Holdings Limited Annual Report and Accounts 2021
- Northern Gas Networks Finance Plc Annual Reports and Accounts 2021
- Northern Gas Networks Limited Annual Report and Accounts 2021
- Northern Gas Networks Operations Limited Annual Report and Accounts 2021
- Northern Gas Networks Finance plc Annual Report and Accounts March 2020
- Northern Gas Networks Limited Annual Report and Accounts March 2020
- Northern Gas Networks Operations Limited Annual Report and Accounts March 2020
- Northern Gas Networks Holdings Limited Annual Report and Accounts March 2020
Transportation Pricing
2023-24 Final-Transportation-Charging-Statement
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Archive
- 2024-25 (150 Day Notice) Pricing Statement
- 2023-24 (150 Day Notice) Pricing Statement
- 2022-23 (60 day Notice) Change to Supplier of Last Resort Charges
- 2023-24 (60 day notice) Pricing Statement
- 2022-23 (60 day Notice) Pricing Statement
- Supplier of Last Resort Claims 2022-23
- 2022-23 (150 day Notice) Pricing Statement
- April 2009 Pricing Statement
- October 2009 Pricing Statement
- November 2009 Notice
- January 2010 Notice
- April 2010 Pricing Statement
- November 2010 Notice
- January 2011 Notice
- April 2011 Pricing Statement
- October 2011 Pricing Statement
- November 2011 Notice
- January 2012 Notice
- October 2012 Pricing Statement
- May 2012 Notice
- July 2012 Notice
- January 2012 Notice
- November 2012 Notice
- January 2013 Notice
- April 2013 Pricing Statement
- November 2013 Notice
- April 2014 Notice
- April 2014 Pricing Statement
- October 2014 Pricing Statement
- April 2015 150 Day Notice
- April 2015 60 Day Notice
- April 2015 Pricing Statement
- April 2016 60 Day Notice
- April 2016 Pricing Statement
- 2017/18 (150 day notice) Pricing Statement
- 2017/18 (60 day notice) Pricing Statement
- 2018/19 (150 day notice) Pricing Statement
- 2018/19 (60 day notice) Pricing Statement
- 2019/20 (150 day notice) Pricing Statement
- 2019/20 (60 day notice) Pricing Statement
- 2020/2021 (150 day notice)
- 2020/2021 (60 day notice)
- Charging Statement 2020/2021
- Supplier of Last Resort Claims 2020
- 2021/2022 (150 day notice) Pricing Statement
- Charging Statement 2021/2022
- Supplier of Last Resort Claims 2021
Metering Pricing
Connections Charges
Directors Remuneration
Purchase Order Terms and Conditions for Goods and Services
Investor Presentations
Interim Accounts
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Archive
- Northern Gas Networks Limited September 2022
- Northern Gas Networks Operations Limited September 2022
- Northern Gas Networks Finance Plc September 2022
- Northern Gas Networks Operations Limited September 2021
- Northern Gas Networks Limited September 2021
- Northern Gas Networks Holdings Limited September 2021
- Northern Gas Networks Finance Plc September 2021
