Sources: Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency.

Link: https://www.ons.gov.uk/peoplepopulationandcommunity/populationandmigration/populationestimates/datasets/vitalstatisticspopulationandhealthreferencetables

Infant and neonatal mortality rates for the United Kingdom are calculated by including births in Northern Ireland to non-residents in the denominator.

The infant mortality and neonatal mortality rates for Northern Ireland represent the rate per 1,000 live births including non Northern Ireland resident births.