Draft determinations: Advanced Procurement Mechanism re-opener 2026 (RIIO-ET3)
- Publication type:
- Consultation
- Publication date:
- Last updated:
- Closed date:
- Status:
- Closed (with decision)
- Topic:
- Energy network price controls,
- Electricity transmission
- Subtopic:
- RIIO-T3: transmission price control 2026 to 2031
This consultation has concluded
Proposed changes to Advanced Procurement Mechanism (APM) allowances and adding a new APM Cost Category.
Details of outcome
We have decided to:
- increase the APM bespoke procurement allowances across all three electricity transmission licensees
- add Permanent Modular Substations (32kV, 132kV, 275kV) as a new, flexible APM cost category
Access the updated APM Governance Document v1.3.
Read the full outcome
Final Determinations: Advanced Procurement Mechanism Re-opener 2026 (RIIO-ET3) [PDF, 223.67KB]
Annex 1: direction for NGET [PDF, 105.23KB]
Annex 2: direction for SHET [PDF, 105.19KB]
Annex 3: direction for SPT [PDF, 105.01KB]
APM re-opener 2026 consultation responses [ZIP, 2.81MB]
Consultation description
We are consulting on our Draft Determinations to:
- increase the APM bespoke procurement allowance across all three electricity transmission licensees
- add Modular Substations (32kV, 132kV, 275kV)’ as a new APM cost category
Who should respond
- Electricity transmission owners
- Consumer groups
- Manufacturers of electricity transmission equipment
- Electricity transmission innovation community
How to respond
Submit your response by 5pm on 31 July 2026 by emailing RIIO3@ofgem.gov.uk.
All updates
2 October 2026 updated with our Final Determinations and non-confidential consultation responses