Long Term Development Statement (LTDS) Table 4a Fault level data - 3 phase

The LTDS is published at the end of May and November each year. Long Term Development Statement Table 4a shows the 3 phase fault level at each Grid and Primary substation.

Published 29th May 2026. More information and full reports are available from the landing page below: Long Term Development Statement Landing Page Methodological Approach Site Functional Locations (FLOCs) are used to associate the Site 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.