GasElectricityMeteringPropertyInterconnectorsLand and DevelopmentGrain LNG

System Operator - Transmission Owner Code (STC)

Welcome to the System Operator - Transmission Owner Code (STC) Website. The SO-TO Code was activated on the BETTA Go-Active Date (1st September 2004). The STC Code defines the high-level relationship between the GB System Operator and the Transmission Owners. It is supported by a number of procedures (SOTO Code Procedures or STCPs) that will set out in greater detail the roles, responsibilities, obligations and rights etc of the GBSO and the TOs.

Information relating to all aspects of the STC will be accessible on this site as they are developed, including STC Procedures (STCPs) and documents relating to proposed amendments to the STC. Information regarding the STC and STCP amendment process is contained within section B of the STC (Governance).

Meeting Documents

Agendas, minutes and papers for committee meetings are all available from the website.

Some of the most recent and upcoming dates are listed below.

 

 

Subscribe to notification services

National Grid offers a free subscription service for CUSC, STC and Grid Code Alerts via email.

System Operator - Transmission Operator Code

Aggregated versions of the code document can be found below. For section by section documents please see the library area.

Progress Reports

The current register is shown below, an archive of previous reports is also available.

Amendment Register

The current register is shown below an archive of previous reports is also available