Energy licence modification appeals 2026

The Competition and Markets Authority (CMA) is considering whether to grant permission to appeal to 5 energy companies against modifications made on 3 February 2026 to gas distribution licences, following Ofgem’s RIIO-3 price control decisions.

• From: Competition and Markets Authority
• Published: 6 March 2026
• Last updated: 19 March 2026 — See all updates

• Case type: Regulatory references and appeals
• Case state: Open
• Market sector: Energy
• Opened: 4 March 2026

Timetable for applications for permission

Date	Action
3 March 2026	Permission to appeal sought by 5 parties
17 March 2026	Ofgem lodged submission in relation to the applications for permission to appeal
31 March 2026	Deadline for CMA to make decision whether to grant permission to appeal

Notices of appeal

3 March 2026: 5 licence holders have sought permission to appeal the decision by GEMA (Ofgem’s governing body) of 3 February 2026 on proposed modifications to the gas distribution licences. These licence modifications are based on Ofgem’s RIIO-3 price control decisions of 4 December 2025, which set out how much energy companies can charge their customers.

The administrative timetable for the CMA’s decision on whether to grant permission to appeal can be found above.

• Cadent notice of appeal (PDF, 891KB) (6.3.26)
• Northern Gas Networks notice of appeal (PDF, 985KB) (6.3.26)
• Southern Gas Networks and Scotland Gas Networks notice of appeal (joint application) (PDF, 1.8MB) (6.3.26)
• Wales & West Utilities notice of appeal (PDF, 2.2MB) (6.3.26)

Contact

RIIO-3Appeals2026@cma.gov.uk

Published 6 March 2026

Last updated 19 March 2026 + show all updates

1. 19 March 2026

   Timetable updated.

2. 6 March 2026

   First published.