Sources: Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency – Vital statistics in the UK: births, deaths and marriages
- The infant mortality rate is calculated based on the number of deaths under 1 year per 1,000 births. The chart shows the infant mortality rate in the United Kingdom from 1930 to 2019.
- The infant mortality rates for the United Kingdom are calculated by including births in Northern Ireland to non-residents in the denominator.
- Death figures are based on deaths registered rather than deaths occurring in a calendar year.
For further detail on methodology access the ONS user guide to mortality statistics