Supporting documents

Appendix 01: Assurance statement

Appendix 02: Climate resilience strategy

Appendix 03: Cost assessment and benchmarking approach

Annex 3A: Ongoing efficiency at RIIO-3

Annex 3B: Further evidence on OE at RIIO-3

Annex 3C: Understanding the Baseline Level of Efficiency in London

Appendix 04: Not published. See redaction statement.

Appendix 05: Joint-GDN vulnerability strategy

Appendix 06: Environmental action plan

Appendix 07: Finance

Annex FA 01: Oxera cost of equity

Annex FA 02: Oxera Gas Distribution networks' dividends in RIIO-3

Annex FA 03: Oxera RIIO-3 cost of equity - CAPM Parameters

Annex FA 04: Oxera Review of the regulatory regimes and business mixes for relevant European comparators

Annex FA 05: Frontier cost of equity cross-check evidence

Annex FA 06: Not published. See redaction statement.

Annex FA 07: NERA Additional cost of borrowing for the RIIO-3 price control

Annex FA 08: NERA Impact of GDNs' reduced debt tenor on additional cost of borrowing at RIIO-3

Annex FA 09: Not published. See redaction statement.

Annex FA 10: Not published. See redaction statement.

Annex FA 11: Oxera Risks and investability of the GB gas distribution sector

Annex FA 12: Not published. See redaction statement.

Appendix 08: Innovation strategy

Appendix 09: IT & Telecoms strategy

Appendix 10: Network asset management strategy

Appendix 11: Stakeholder engagement and decision log

Appendix 12: Statement from ISG Chair

Appendix 13: Not published. See redaction statement.

Appendix 14: Digitalisation strategy

Appendix 15: Digitalisation action plan

Appendix 16: Vulnerability strategy

Appendix 17: Workforce and supply chain resilience strategy

Appendix 18: Not published. See redaction statement.

AEJP 01: Expanding target data architecture

AEJP 02: Common information model for gas

AEJP 03: Data sharing infrastructure

AEJP 04: Modernisation of RRP

AEJP 05: Unified asset investment portfolio management

AEJP 06: Digital Platform for Leakage Analytics (DPLA)

EJP 01: Civil interventions

EJP 02: Electrical, Instrumentation & Telemetry on Offtakes & PRS

EJP 03: Filters on Offtakes & PRS

EJP 04: Governor interventions

EJP 05: Services not associated with mains replacement

EJP 06: Housing interventions

EJP 07: Mains diversions (chargeable & non-chargeable)

EJP 08: Mains IMRRP (including associated <=2" Steel)

EJP 09: Cost beneficial mains replacement

EJP 10: MOB's risers

EJP 11: PE riser interventions

EJP 12: Pipeline integrity

EJP 13: Pipeline isolation valves

EJP 14: Pipeline monitoring & protection

EJP 15: Preheat on offtakes & PRS

EJP 16: Pressure monitoring & control on governors

EJP 17: Pressure reduction on offtakes & PRS

EJP 18: Reinforcements below 7bar

MJP 01: Capacity upgrades

MJP 02: Not published. See redaction statement.

MJP 03: Flow Weighted Average Calorific Value Compliance (FWACBC)

MJP 04: London medium pressure

MJP 05: Not published. See redaction statement.

MJP 06: West Winch pipeline

MJP 07: Grays medium pressure

Supporting Document: Redaction Statement

Supporting Document: Navigating our plan

Supporting Document: Glossary