Our Data
Understanding the databases curated by Connected West Yorkshire
It is important to distinguish between the two main datasets available, as they have different approval requirements and data coverage.
CY provides linked records from the full population of service users accessing primary care, secondary care, community care, and other services (excluding education). The time coverage varies by data provider but typically spans from the earliest digitally held record to the most recent extract. This dataset contains records from 1.2 million service users. Connected Yorkshire has Research Ethics Committee (REC) approval to provide de-identified data for research purposes.
CB links education records with records from service users accessing primary care, secondary care, community care, and other services. This dataset contains education records from 357,317 linked service users born after January 1988. In CB, some sensitive Health Data (for example, sexual health codes) have been removed; a codelist is available on request. The current data extract includes education records up to December 2025. Connected Bradford has both REC approval and Confidentiality Advisory Group (CAG) approval. Data linkage between health and education data is undertaken with ‘s251’ support’ from the HRA following CAG advice.
| Section | Dataset | Description | Population Count | Last Updated | Date Range |
| Primary care
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Primary care
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| The Primary care dataset contains General Practice data from all GP’s within Bradford and Airedale geography , this partially covers some practices operating in Calderdale (limited) All data captured at a practice is included including clinical and administrative events, appointments, visits, medications, immunisations etc. This is coded in CTV3 and Snomed format.
Typically cohorts can be identified using a demographic attribute linked to a clinical condition. |
1,252,943 | 24/04/2026 | Start of record to 07/04/2026 | ||
| Secondary care
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Data for Calderdale, Airedale is in the format of Secondary Use Sources (SUS+). The format can be found here . For Airedale and Calderdale we have ECDS (Emergency Care , APC (Admitted Patient Care) and OP (Outpatients) . These are in ICD10 format . and Emergency Care format.
For Bradford Royal Infirmary we receive a direct feed from the hospital which includes a number of tables (including three in SUS+ format) plus maternity , lab results and other data sources (Contact for details) |
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| Bradford | 1,215,114 | 05/03/2026 | 01/04/2021 to 30/07/2025 | ||
| Calderdale | 476,167 | 26/11/2025 | 01/??/2017 to 30/09/2023 | ||
| Airedale | 439,910 | 19/02/2025 | 01/04/2015 to 09/02/2025 | ||
| Accident and Emergency | For the three hospitals referenced we receive ECDS (Emergency Care in SUS+ format )
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| Bradford | 270,003 | 05/03/2026 | 01/04/2021 to 30/07/2025 | ||
| Calderdale | 332,034 | 26/11/2025 | 01/17/2017 to 30/09/2023 | ||
| Airedale | 300,694 | 19/02/2025 | 01/04/2015 to 09/02/2025 | ||
| Adult Social Care | This contains Assessments, Contacts and Services offered, at a very high level. Non of this is coded. Additional information on this can be found in Github. | 93,457 | 17/09/2025 | 01/01/2017 to 30/09/2024 | |
| Children’s social care | This data comes from historical council data and new from the Children’s trust. It includes Children in need, Children | 4,5867 | 27/8/2025 | 03/04/2017 to 09/06/2021 | |
| Yorkshire Ambulance Service | This data includes 111, 999, patient transfer service and data from the YAS patient record system, covering the whole of Yorkshire and Humber is wide ranging dataset. | 5,121,282 | 07/05/2026 | 01/04/2014 to 08/02/2026 | |
| National Child Measurement programme | This dataset contains the height and weight of children measured over a number of years. | 168,351 | 01/01/2024 | 01/02/2022 to 31/10/2023 | |
| Dental activity | Captures data in the FP17 data format. It covers the full population Leeds and Bradford postcodes. | 902,843 | 06/06/2024 | 17/07/2006 to 22/03/2023 | |
| Death Certificates
Currently restricted to BTHFT projects only |
Contains Death certificate data in ICD10 format and textual for the whole of yorkshire. | 493,665 | 10/03/2026 | 11/08/1969 to 10/02/2026 | |
| Education data | This dataset contains education records from linked service users born after January 1988. School registration, attendance and attainment data. Contact the research team for detailed data structure. Please note there are additional restrictions on reporting school level and individual level education data in Connected Bradford projects | 357,317 | 14/04/2026 | 01/09/1995 to 31/07/2025 | |
| Property level data | There are a series of datasets related to property level data. There is a single detailed dataset that contains green space data , air quality, property attributes, distance to fast food outlets etc within n within 300m circular buffer around the home address, using 2018 data from the Department for Environment, Food and Rural Affairs. There are also specific datasets relating to items below. | No. of properties (approx.) | Last updated 06/01/2023 | As at 06/01/2023 | |
| Green space | Contains environmental data related to distances to green spaces and open areas from properties (pseudonymised uprns) | 238, 504 | 06/01/2023 | ||
| Air quality | Contains environmental data related to air quality and other factors linked to pseudonymised uprns.
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n/a | 06/01/2023 | ||
There is a separate dataset for air quality monitors within Bradford District. Covering monitors on :
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2018 to 2022 | ||||
| A further dataset details the distance from a pseudonymised uprn to the clean air zone in Bradford. | 1539099 properties | 12/11/2025 | |||
| Housing attributes | As above but related to housing attributes such as property type, glazing type , energy rating etc. linked to pseudonymised uprns. | n/a | 06/01/2023 | ||
| Area level data | |||||
| Crime | There is crime data related to the LSOA,Postcode of a crime. This describes the actual offence and the actions taken. It is very high level and individuals cannot be identified. | 374 lsoa’s | 14/03/2023 | 2020/04_to_2022/03 | |
| Benefits | By postcode/lsoa lists the number of children and adults in a property and whether any Disabled income received. Presence in tis dataset indicates other benefits (unspecified) are being received | 52,897 households | 14/03/2024 | ||
| LSOA | This is a dataset derived from the Primry Care Address History table that links a property to its LSOA. Please note there is NO prioerty identification (no, street, town etc.)) we have partial postcode, lsoa and linked to pseudonymised uprns. | ||||
| Deprivation | There is a dataset with Index of Multiple Deprivation (IMD) that can be linked to lsoa’s.
Note a new 2025 release has not yet been |
2019 | Find out more here | ||