Long Term Development Statement (LTDS) Table 1 Circuit data

Introduction
The Long Term Development Statement (LTDS) report on a 0-5 year period, describing a forecast of load on the network and envisioned network developments. The LTDS is published at the end of May and November each year.
This is Table 1 from our current LTDS report (published 28 November 2025), showing the circuit associated with each Grid and Primary substation. More information and full reports are available from the landing page below:
Long Term Development Statement and Network Development Plan Landing Page — UK Power Networks (opendatasoft.com)

Methodological Approach

Site Functional Locations (FLOCs) are used to associate the From Substation to Key characteristics of active Grid and Primary sites — UK Power Networks
ID field added to identify row number for reference purposes

Quality Control Statement
Quality Control Measures include:

Verification steps to match features only with confirmed functional locations.
Manual review and correction of data inconsistencies
Use of additional verification steps to ensure accuracy in the methodology

Assurance Statement
The Open Data Team and Network Insights Team worked together to ensure data accuracy and consistency.

Other
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