Policy Compass
Gas transmission

RIIO-2: NESO regulatory instructions and guidance

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The Regulatory Instructions and Guidance (RIGs) are a framework that helps National Energy System Operator Limited (NESO) to provide Ofgem with detailed data during the RIIO-2 period. We collect this data to monitor NESO’s performance against their RIIO-2 objectives and hold them to account.

Details

The Regulatory Instructions and Guidance (RIGs) explain:

  • what information we plan to collect
  • how to provide this information

The main licence condition that requires NESO to provide us with this information is Condition G3 (Regulatory Instructions and Guidance). This is a condition of both the Electricity System Operator licence and the Gas System Planner licence.

The RIGs came into effect on 1 April 2022 and will apply until 31 March 2026.

Note: the RIIO-2 NESO regulatory reporting pack version 3.2 attached below is not fully accessible. If you require an alternative format, please contact NESORegulation@ofgem.gov.uk.

Main document

[RIIO-2 NESO regulatory instructions and guidance version 3.2.pdf [PDF, 346.78KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-06/RIIO-2%20National%20Energy%20System%20Operator%20%28NESO%29%20regulatory%20instructions%20and%20guidance.pdf)

Subsidiary documents

[RIIO-2 NESO regulatory reporting pack version 3.2 [XLSX, 4.56MB]

](https://www.ofgem.gov.uk/sites/default/files/2025-06/RIIO-2%20NESO%20-%20Regulatory%20Reporting%20Pack%20Version%203.2.xlsx)

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