Capacity Heatmaps Information Model SPD

For the avoidance of doubt, this data should not be used for safety critical purposes without the use of appropriate safety checks and services e.g. LineSearchBeforeUDig etc. Please raise any potential issues with the data which you have received via the feedback form available at the Feedback tab above (must be logged in to see this). The Capacity Heatmaps dataset provides a view of available network headroom based on the current connected position at SPEN substations and including LTDS connection activity.

It offers an indicative representation of how capacity is currently allocated across the network, enabling users to identify local areas where headroom exists or where commitments may limit further connections under present conditions. Users should note that demand headroom is also dependent on upstream network capacity, and generation headroom is influenced by voltage‑control constraints on export as well as the type of generation technology, each of which contributes differently to system fault levels.

The data provides an understanding of the existing network position, supporting early-stage assessment of connection opportunities. The data are indicative only; hence must not be used for safety-critical purposes and cannot be used for accurate connection assessments. This dataset should not be interpreted as a forecast of future network capacity.

Users seeking insight into how network headroom may change under future demand and generation scenarios, such as those driven by electrification and net zero targets, should refer to the Network Development Plan's Network Scenario Headroom Report (NDP NSHR). Our NSHR data incorporates Distribution Future Energy Scenarios (DFES) projections to provide a forecast view of future headroom. Neither the Capacity Heatmaps nor the NSHR replaces the formal connections process.

All connection enquiries must be progressed through the appropriate application route, as detailed by SP Energy Networks: spenergynetworks.co.uk/pages/which_type_of_connection.aspx. Data Triage As part of our commitment to enhancing the transparency, and accessibility of the data we share, we publish the results of our Data Triage process. Our Data Triage documentation includes our Risk Assessments; detailing any controls we have implemented to prevent exposure of sensitive information.

Click here to access the Data Triage documentation for the Distributed Generation Heat Maps dataset. To access our full suite of Data Triage documentation, visit the SP Energy Networks Data & Information . Download dataset metadata (JSON)