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

P520: Update the Manifest Errors process to align with revised MHHS Settlement Timetable
Decision Date: 10 November 2026

P441: Creation of Complex Site Classes
Decision date: 5 January 2027

P494: Establishing a Smart Data Repository (SDR)
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

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

CMP316: Inclusion of Virtual Trading Parties as Performance Assurance Parties
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

CMP417:  Extending principles of CUSC Section 15 to all Users
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

CMP445: Pro-rating first year TNUoS for Generators
Decision date: to be announced

CMP440: Re-introduction of Demand TNUoS locational signals by removal of the zero-price floor
Decision date: to be announced

CMP453: To Bill BSUoS on a net basis at BSC Trading Units
Decision date: to be announced

CMP469: GC0186 Cost Recovery mechanism for CUSC Parties
Decision date: to be announced

Distribution Code (DCode)

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

Decisions pending

DRCP/MP/23/04-EREC P2/ EREP 130/ EREP 131
Decision date: 18 January 2027

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

DCP466: Tariff band to follow capacity
Decision date: to be announced

DCP452: Correct application of Forward Cost Pricing EDCM charges to users connected directly to a Grid Supply Point
Decision date: to be announced

Grid Code (GC)

NESO is the body responsible for the Grid Code.

Decisions pending

GC0103: The introduction of harmonised Applicable Electrical Standards in GB to ensure compliance with the EU Connection Codes
Decision date: to be announced

GC0168: Submission of Electro Magnetic Transient (EMT) Models
Decision date: to be announced

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

CSL01: Exclusion of Standalone Networks from IGT UNC
Decision date: 30 November 2026 

Retail Energy Code (REC)

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

Decisions pending

R0268: Consequential Cross-Code Change for BSC P441 - Complex Site Classes Creation
Decision date: 5 January 2027

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 

CM093: Extending the principles of the User Commitment Methodology to Final Sums Methodology as a consequence of CUSC Modification – CMP417
Decision date: to be announced

CM097: EMT and RMS Model Submission for TOs
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

UNC0903: The Introduction of a Single NTS Capacity Reference Price
Decision date: 15 February 2027 

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

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