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 2a from our current LTDS report (published 28 November 2025), showing the Transformer information for two winding (1x High Voltage, 1x Low Voltage) transformers associated with 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
\n\nQuality 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: Open Data Portal 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": "2025-11-28T08:28:19.649000+00:00", "modified_updates_on_metadata_change": false, "modified_updates_on_data_change": true, "data_processed": "2025-11-28T08:28:19.649000+00:00", "metadata_processed": "2025-11-28T08:28:19.726000+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": 2175, "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 2a Transformer Data - 2W", "alternative": null, "subject": ["Transformers", "Distribution System Operator (DSO)", "Grid Substation", "Primary Substation", "Long Term Development Statements (LTDS)"], "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 2a from our current LTDS report (published 28 November 2025), showing the Transformer information for two winding (1x High Voltage, 1x Low Voltage) transformers associated with 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
\n\nQuality 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: Open Data Portal 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/ltds-table-1-circuit-data/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-2b-transformer-data-3w/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-3a-load-data-observed/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-3b-load-data-true/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-4a-3ph-fault-level/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-4b-earth-fault-level/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-5-generation/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-6-interest-connections/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-7-operational-restrictions/; https://ukpowernetworks.opendatasoft.com/explore/dataset/ltds-table-8-gt-95-perc-fault-data/", "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": "2025-11-28T08:28:19.649000+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}}}}