Energy code timetable

Energy codes can be changed or updated, for example to remove specific requirements.

We approve or reject energy code modifications. The outcome and reason for each change is published in the list of Energy code publications.

You can get further information on proposed changes to energy codes on the Code Administration Code of Practice website.

This page is updated at the end of each calendar month. 

Energy code proposed changes

Proposed changes to energy codes that we are reviewing and dates we aim to decide the outcome.

Balancing and Settlement Code (BSC)

Elexon is the Code Administrator for the Balancing and Settlement Code.

Decisions pending

P487: Incentive of BSC Supplier Parties to meet the M15 MHHS Milestone.
Decision date: to be announced

Carbon Capture and Storage Network Code (CCS N Code)

The CCS (Carbon Capture and Storage) Network Code body manages the CCS N Code.

Decisions pending

There are no modifications to the CCS N Code with us for decision.

Connection and Use of System Code (CUSC)

The National Energy System Operator (NESO) is the organisation responsible for the Connection and Use of System Code. 

Decisions pending

CMP344: Clarification of Transmission Licensee revenue recovery and the treatment of revenue adjustments in the Charging Methodology
Decision date: to be announced 

CMP397: Consequential changes required to CUSC Exhibits B and D to reflect CMP316 (Co-Located Generation Sites)
Decision date: to be announced

CMP315: TNUoS: Review of the expansion constant and the elements of the transmission system charged for
Decision date: to be announced 

CMP375: Enduring Expansion Constant & Expansion Factor Review
Decision date: to be announced 

CMP330: Allowing new Transmission Connected parties to build Connection Assets greater than 2km in length
Decision date: to be announced 

CMP374: Extending contestability for Transmission Connections
Decision date: to be announced

CMP423:  Ensuring non-BM Balancing Services providers pay for non-delivery imbalances at a price that reflects the real-time value of energy 
Decision date: to be announced

CMP316: TNUoS Arrangements for Co-located Generation Sites
Decision date: to be announced 

CMP453: To Bill BSUoS on a net basis at BSC Trading Units
Decision date: 30 September 2026

Distribution Code (DCode)

The Energy Networks Association is the body responsible for the Distribution Code.

Decisions pending

There are no modifications to the Distribution Code with us for decision.

Distribution Connection and Use of System Code (DCUSA)

Electralink is the body responsible for the Distribution and Use of System Agreement. 

Decisions pending

DCP412: Discounts from TCR charges for ‘peaky’ final demand customers
Decision date: to be announced 

Grid Code (GC)

NESO is the body responsible for the Grid Code.

Decisions pending

GC0169: Material changes arising from Grid Code Modification GC0136
Decision date: 31 March 2026

GC0173: Consistency of Technical and Compliance Requirements between GB and European Users
Decision date: 31 March 2026 

Independent Gas Transporters Uniform Network Code (IGT UNC)

The Independent Gas Transporters’ (IGT) Uniform Network Code (UNC) is the body responsible for the Independent Gas Transporters Uniform Network Code.

Decisions pending

IGT165: Independent Shrinkage Expert and Independent Shrinkage Charge - IGT UNC
Decision date: 16 March 2026

Retail Energy Code (REC)

The Retail Energy Code Company limited is the body responsible for the Retail Energy Code.

Decisions pending

There are no modifications to the REC with us for decision.

Smart Energy Code (SEC)

The Smart Energy Code Company houses the Smart Energy Code Administrator and Secretariat. SECCo is the body responsible for the Smart Energy Code.

Decisions pending

There are no modifications to the SEC with us for decision.

Security and Quality of Supply Standard (SQSS)

NESO is the body responsible for the Security and Quality of Supply Standard. 

Decisions pending

There are no modifications to the SQSS with us for decision.

System Operator Transmission Owner Code (STC)

NESO is the body responsible for the System Operator - Transmission Owner Code.

Decisions pending

CM078: STC change for CUSC Modification CMP328 - Connection Trigger Distribution Impact Assessment
Decision date: to be announced 

Uniform Network Code (UNC)

The Joint Office of Gas Transporters is the body responsible for the Uniform Network Code. 

Decisions pending

UNC0843: Establishing the Independent Shrinkage Charge and the Independent Shrinkage Expert | Joint Office of Gas Transporters - Gas Governance
Decision date: 16 March 2026 

UNC0903: The Introduction of a Single NTS Capacity Reference Price
Decision date: 14 December 2026 

UNC0918 - Temporary reintroduction of the enhanced pressure service and increased MNEPOR for BBLC (reintroduced by UNC0891 and UNC0859 and introduced by UNC0814)
Decision date: 7 May 2026

UNC0894/A: Facilitating Biomethane entry into the GDN by exporting methane from the GDN into the NTS via Compression
Decision date: to be announced   

UNC0915: Debt Relief Scheme Payments (DRSP)s
Decision date: to be announced

UNC0900: Amendment to the Gas Quality NTS Entry Specification at Biomethane System Entry Points
Decision date: to be announced

UNC0907 - Extension to current maintenance period
Decision date: to be announced