Re-opener Guidance and Application Requirements
- Publication type:
- Guidance
- Publication date:
- Last updated:
- Topic:
- Energy network price controls
- Subtopic:
- Electricity distribution price control 2023 to 2028 (RIIO-ED2), Gas distribution price control 2023 to 2028 (RIIO-GD2), Transmission price control 2021 to 2026 (RIIO-T2)
- Industry sector:
- Transmission Network,
- Distribution Network
Guidance for transmission, gas distribution and electricity distribution network companies on how they must prepare their Re-opener applications.
Details
We have consulted on the modifications to the previous Re-opener Guidance and Application Requirements Document on 20 February 2025. The comments we received are reflected in the updated Re-opener Guidance and Application Requirements: Version 4. The new version should be read in conjunction with Special Condition 9.4 (Re-opener Guidance and Application Requirements Document) of the Gas Transporter, Electricity Transmission and Electricity Distribution licences.
This guidance sets out the regulation, governance and administration of the RIIO-2 Re-openers and will take effect immediately. It replaces the previous version issued on 3 April 2023. The guidance contains:
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Reopener Guidance and Application Requirements: Version 4
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Appendix 12: Redaction Policy - Version 1
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Direction: Reopener Guidance Revision October 2025
The direction gives effect to the revised Guidance in accordance with Special Condition 9.4 of the electricity transmission, gas transmission, electricity distribution, and gas distribution licences.
Documents
All updates
28 October 2025 added appendix 12 clarifying redaction policy.
17 February 2023 incorporated updates to reflect the start of RIIO-ED2.
3 February 2022 added specific guidance for MSIP Re-opener, clarified cost information to be included, clarified application of this guidance to FIOC Re-opener.
26 February 2021 first version published following consultation of draft guidance.