Introduction This dataset provides a geospatial view of High Voltage (HV) Flexibility Zones where long-term flexibility services have been tendered for by UK Power Networks. The dataset presents HV Flexibility Zones by tender round, showing whether UK Power Networks was procuring flexibility to manage constraints in a zone relating to high demand (e.g. reduced consumption or increased generation at times of peak demand) or excess generation (e.g. increased consumption or reduced generation at times of excess renewable generation). It is intended to help flexibility service providers understand where long-term HV flexibility requirements have been located over time.   For information on the historic delivery of flexibility services, please refer to the  Flexibility Dispatches dataset Methodological ApproachEach HV Flexibility Zone is shown as a geographic area representing the location of a network constraint. Zones are linked to a specific tender round and indicate whether flexibility was sought for Demand or Generation constraints. These requirements reflect the requirements at the time the flexibility tender was run and may not represent current network needs. As part of the flexibility procurement process, individual meter points (MPANs) are checked to confirm final eligibility. This dataset provides an indicative view of where flexibility has been required by UK Power Networks in the past and does not confirm eligibility to participate in future tenders. Quality Control StatementThe dataset is subject to a series of quality control checks prior to publication. These include: Verification of Flexibility Zone boundaries and spatial accuracy Checks that Flexibility Zone names align with those used in other datasets on the Open Data Portal Consistency with zone naming used on Localflex and within competition data files published on the Tender Hub Assurance StatementThe High Voltage Flexibility Zones by Tender Round spatial map is reviewed prior to publication by a member of the Flexibility Markets team. Other Download dataset information: Metadata (JSON) Definitions 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.