Denominator dataset

Denominator dataset#

Last modified: 23 Jul 2025

UK LLC has created a denominator dataset which serves as the UK LLC 'spine'

The denominator dataset incorporates all participants across all LPS. Each project in the TRE is automatically provisioned a file named ‘CORE_denominator_file1_v0000_YYYYMMDD’.

The date in the dataset name relates to the “File 1” freeze (permissions) to which each project is fixed. Participant permissions are correct and applied to each dataset as of this date.

The core denomininator file includes:

  • one row per UK LLC participant

  • the name of the LPS to which they belong

  • all UK LLC configurable permissions for the different domains of data (e.g. NHS England, place-based).

The denominator file enables users to:

  • calculate linkage rates (when joined to linked datasets)

  • contextualise LPS participants within UK LLC in relation to the LPS datasets.

UK LLC also provides ‘core’ datasets based on NHS England and place-based data.