SAI25 Briefings and Guidance

NR/L3/ELP/SAI25 working on about overhead line equipment (SAI) has been expanded to cover the Routes in North West & Central and Eastern Regions, for compliance by September 2025.

The standard introduces a change to the way we plan and deliver isolations, specifically an enhanced electrical risk assessment and clarification on the management of distribution interfaces. Where introduced, SAI25 replaces NR/L3/ELP/29987, also known as the Green Book.

If you carry out work in North West & Central and Eastern regions and hold one of the identified competencies below or carry out associated activities, you will need to review the detailed briefing(s) and update your Sentinel record, prior to the deployment area moving to SAI25.

If you do not work in one of these deployment areas, you do not need to review the detailed briefings at this time.

Training and Briefing Guidance

  1. SAI25 Who needs to complete training or briefing?
  2. SAI25 Learning Journey

Overview Briefings

  1. Overview video for SAI25 Enhanced Electrical Risk Assessment
  2. Overview presentation for SAI25 Distribution Interfaces

Detailed Briefings

  1. 1. COSS OLP detailed briefing
  2. 2. OTP Core (for Machine Controller / Operator & POSREP) detailed briefing
  3. 3. Level A Distribution (LA DIST AC-i) detailed briefing
  4. 4. ECO detailed briefing
  5. 5. Work requestors detailed briefing
  6. 6. Route / Incident control detailed briefing


For any queries, please contact ESDSAISupport@networkrail.co.uk

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