FAQs about working with UK LLC-managed data

Last modified: 19 Mar 2026

Answers to researchers' questions about working with UK LLC-managed data.

Will more linked derived datasets be added to the UK LLC resource?

Once additional linked data is available (e.g. NHS Wales, HMRC), it is likely that new datasets will be derived from these and added to the TRE.

Where are the CORE datasets that UK LLC used to provision to all projects?

Prior to October 2025, UK LLC projects were provisioned 4 ‘CORE’ datasets (outlined in column 1 of the table below). In response to feedback from LPS around participant permissions, and following internal review of our dataset naming conventions, these datasets were renamed and relocated into the UK LLC-managed schema as NHS England reference datasets.

All projects that started before these changes, were updated to use the new naming conventions in October 2025.

Previous dataset name	Current dataset name	Description
CORE_denominator_file1	UKLLC_study_permissions	Cohort and linkage permission for each unique study participant
CORE_nhsd_presence	UKLLC NHSE_patient_service_usage	Count of participants’ appearances and last usage for NHSE datasets
CORE_nhsd_derived_indicator	UKLLC_nhse_patient_demo_mortality	Derived key demographic variables for participants with linkage to NHSE data
CORE_nhsd_lsoa11	UKLLC_nhse_lsoa11_dataset_mapping	LSOA11 lookup for participants with linkage to NHSE data

Further information will be added to this page as the UK LLC generated datasets become more widely available.
Any queries about these datasets should be emailed to support@ukllc.ac.uk.