RIIO-3 Associated Documents Modifications Consultation
Summary
Ofgem published a consultation on proposed modifications to RIIO-3 associated documents, including GD2/GD3 and GT2/GT3 Crossover Guidance documents, an issues log, and NGET NLRE PCD Suite supplementary guidance. The consultation covers methodology and process for making crossover adjustments to allowances for gas distribution, gas transmission, and electricity transmission networks. Comments close 13 May 2026.
What changed
Ofgem is consulting on modifications to RIIO-3 price control associated documents, including four draft guidance documents: GD2/GD3 Crossover Guidance, GT2/GT3 Crossover Guidance, the related issues log, and NGET NLRE PCD Suite Supplementary Guidance (Appendix 7 to PCD Reporting Requirements Version 6). These documents establish scope, principles, methodology, and process for GD2/GD3 and GT2/GT3 crossover adjustments to allowances, including Ofgem's assessment and implementation approach.
Energy networks (gas distribution, gas transmission, and electricity transmission) and interested parties should review the draft documents and submit comments to RIIO3@ofgem.gov.uk by 13 May 2026. The NGET NLRE PCD Suite guidance specifically affects NGET's reporting requirements for three Price Control Deliverables. Non-participation could result in networks being unprepared for crossover adjustment processes when RIIO-3 takes effect.
What to do next
- Review draft GD2/GD3 and GT2/GT3 Crossover Guidance documents for impact on network operations
- Submit comments to RIIO3@ofgem.gov.uk by 13 May 2026
- Assess NGET NLRE PCD Suite supplementary guidance if applicable to electricity transmission operations
Source document (simplified)
Modifications to additional network price control (RIIO-3) associated documents
Publication type: Consultation Publication date:
1 April 2026
Closing date: 13 May 2026 Status: Open Topic: Energy network price controls Subtopic: RIIO-3 Get emails about this page Print this page
Related links
- Modifications to the RIIO-3 licences and associated documents | consultation
- Draft Gas Distribution (RIIO-3) crossover submission guidance | consultation
- Draft Gas Transmission (RIIO-3) crossover submission guidance | consultation
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- We are seeking views on the proposed modifications to associated documents for the RIIO-3 price control.
Consultation description
The crossover guidance documents that we are consulting on set out the scope, principles, methodology, and process for making GD2/GD3 and GT2/GT3 crossover adjustments to allowances, including how Ofgem will assess and implement those adjustments. We are also publishing the issues log which sets out our responses to the questions received from networks after our initial consultation.
We propose to include the NGET NLRE PCD Suite Supplementary Guidance as an NGET-specific Appendix 7 to our Price Control Deliverable Reporting Requirements and Methodology: Version 6. It provides direction on reporting requirements for three NGET PCDs.
Who should respond
We welcome responses from:
- gas distribution networks
- gas transmission networks
- electricity transmission networks
- anyone with an interest in the RIIO-3 price control
How to respond
Submit your response by 13 May 2026 by emailing RIIO3@ofgem.gov.uk.
Consultation documents
Draft GD2 and GD3 Crossover Guidance and Submission Requirements document (clean) [PDF, 153.00KB] Draft GD2 and GD3 Crossover Guidance and Submission Requirements document (tracked changes) [PDF, 207.28KB] Draft GT2 and GT3 Crossover Guidance and Submission Requirements document (clean) [PDF, 154.58KB] Draft GT2 and GT3 Crossover Guidance and Submission Requirements document (tracked changes) [PDF, 182.63KB] GD and GT Crossover Guidance issues log [XLSX, 55.09KB] Draft PCD Reporting Requirements and Methodology document – Appendix 7 NGET NLRE PCD Suite supplementary guidance [PDF, 421.09KB] Get emails about this page Print this page
Related links
- Modifications to the RIIO-3 licences and associated documents | consultation
- Draft Gas Distribution (RIIO-3) crossover submission guidance | consultation
- Draft Gas Transmission (RIIO-3) crossover submission guidance | consultation
Share the page
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