The Long Term Development Statements (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.
\nThis is Table 2b from our current LTDS report (published 28 November 2025), showing the Transformer information for three winding (1x High Voltage, 2x Low Voltage) transformers associated to each Grid and Primary substation where applicable.
\nMore information and full reports are available from the landing page below:
\nLong Term Development Statement and Network Development Plan Landing Page
Quality Control Measures include:
\nThe Open Data Team and Network Insights Team worked together to ensure data accuracy and consistency.
\n\nDownload dataset information: Metadata (JSON)
\nDefinitions of key terms related to this dataset can be found in the Open Data Portal Glossary: https://ukpowernetworks.opendatasoft.com/pages/glossary/
To view this data please register and login.
", "theme": ["Network Infrastructure"], "keyword": null, "license": "CC BY 4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "language": "en", "metadata_languages": ["en"], "timezone": null, "modified": "2025-11-28T08:28:36.080000+00:00", "modified_updates_on_metadata_change": false, "modified_updates_on_data_change": true, "data_processed": "2025-11-28T08:28:36.080000+00:00", "metadata_processed": "2025-11-28T08:28:36.148000+00:00", "geographic_reference": null, "geographic_reference_auto": false, "territory": null, "geometry_types": null, "bbox": null, "publisher": "UK Power Networks, Company number 3870728", "references": null, "records_count": 142, "attributions": null, "source_domain": null, "source_domain_title": null, "source_domain_address": null, "source_dataset": null, "shared_catalog": null, "federated": false, "parent_domain": null, "update_frequency": ["ANNUAL_2"]}, "dublin-core": {"title": "Long Term Development Statement (LTDS) Table 2b Transformer Data - 3W", "alternative": null, "subject": ["Transformers", "Distribution System Operator (DSO)", "Grid Substation", "Primary Substation", "Long Term Development Statements (LTDS)", "Extra High Voltage (EHV)"], "description": "The Long Term Development Statements (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.
\nThis is Table 2b from our current LTDS report (published 28 November 2025), showing the Transformer information for three winding (1x High Voltage, 2x Low Voltage) transformers associated to each Grid and Primary substation where applicable.
\nMore information and full reports are available from the landing page below:
\nLong Term Development Statement and Network Development Plan Landing Page
Quality Control Measures include:
\nThe Open Data Team and Network Insights Team worked together to ensure data accuracy and consistency.
\n\nDownload dataset information: Metadata (JSON)
\nDefinitions of key terms related to this dataset can be found in the Open Data Portal Glossary: https://ukpowernetworks.opendatasoft.com/pages/glossary/
To view this data please register and login.
", "abstract": null, "tableOfContent": null, "type": ["Dataset"], "language": ["eng"], "coverage": null, "spatial": "EPN= Eastern Power Networks; SPN= South Eastern Power Networks; LPN= London Power Networks", "temporal_start": null, "temporal_end": null, "relation": "https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-ltds-infrastructure-projects/information/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-1-circuit-data/information/?disjunctive.licencearea; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-2a-transformer-2w/information/?disjunctive.voltage_hv; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-3a-load-data-observed/information/?disjunctive.year; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-3b-load-data-true/information/?disjunctive.season; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-4a-3ph-fault-level/information/?disjunctive.licencearea&disjunctive.sitevoltage; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-4b-earth-fault-level/information/?disjunctive.licencearea&disjunctive.sitevoltage; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-5-generation/information/?disjunctive.licencearea&disjunctive.voltage&disjunctive.fueltype&disjunctive.connectionstatus; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-6-interest-connections/information/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-7-operational-restrictions/information/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-8-gt-95-perc-fault-data/information/", "source": "https://ukpowernetworks.opendatasoft.com/", "replaces": null, "references": null, "requires": null, "conformsTo": null, "hasFormat": null, "hasPart": null, "hasVersion": null, "isFormatOf": null, "isPartOf": null, "isVersionOf": null, "isReferencedBy": null, "isReplacedBy": null, "isRequiredBy": null, "contributor": null, "creator": "UK Power Networks, Company number 3870728", "publisher": "UK Power Networks, Company number 3870728", "rights": null, "accessRights": ["Open"], "license": "CC BY 4.0", "date_start": null, "date_end": null, "available_start": null, "available_end": null, "created": null, "dateAccepted": null, "dateCopyrighted": null, "dateSubmitted": null, "issued": "2021-10-06T00:00:00+00:00", "modified": "2025-11-28T08:28:36.080000+00:00", "valid_start": null, "valid_end": null, "format": ["application/json", "text/csv", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"], "extent": null, "medium": null, "identifier": null, "bibliographicCitation": null, "rightsHolder": null, "accrualMethod": null, "accrualPeriodicity": null, "accrualPolicy": null, "audience": null, "educationLevel": null, "instructionalMethod": null, "mediator": null, "provenance": null}}}}