The UK government, Scottish Government, Welsh Government and Northern Ireland Executive must ensure that health data and digital systems have the capability to identify individuals at high risk of morbidity or mortality from a pandemic disease quickly and accurately in a future pandemic. This should include action to improve health data systems and patient record-keeping by: improving patient data by enabling more granular diagnostic coding; ensuring that care records are compatible across primary and secondary care; and enabling secure data-sharing and linkage across multiple health datasets and systems for identifying individuals at high risk.