This dataset contains structured records of NHS 111 calls handled by Yorkshire Ambulance Service. It includes information on call timing, presenting symptoms, triage outcomes, referral pathways, and other structured fields aligned with national reporting requirements.

This dataset should only be used for studies covering NHS 111 contacts between April 2017 and March 2023. It broadly follows the NHS England NHS 111 Minimum Data Set and differs structurally from earlier data extracts. Researchers should not attempt to combine it with pre-2017 data unless there is a clear justification and defined harmonisation plan.