This chart shows slope index of inequality (SII), a measure of how equally life expextancy is distributed within the region. A SII value of zero would represent all areas in the region having the same life expectancy.
The three regions making up the North of England have been highlighted in red. All three regions (North East, North West and Yorkshire and the Humber) have high SII values for life expectancy, showing they have greater within area inequality. Also for all regions within area inequality has been fairly steady over the time period, while life expectancy has been steadily increasing.
SII in years
Source: Public Health Outcomes Framework