Key points from article :
Many areas in the north of England have seen life expectancy fall within the last decade.
Researchers described the trend as "alarming".
The study analysed all deaths in England between 2002 and 2019.
"Data show that longevity has been getting worse for years in large parts of England," - Majid Ezzati, co-researcher.
Life expectancy fell in some urban parts of Leeds, Newcastle, Manchester, Liverpool and Blackpool.
By 2019, the researchers say there was a 20-year gap in life expectancy between a woman living in Camden versus Leeds.
For men, there was a 27-year gap between Kensington and Chelsea compared with parts of Blackpool.
Average life expectancy in the UK is 79 years for men and just below 83 years for women, according to the ONS.
Differences are down to poverty, insecure employment as well as reductions in welfare support and healthcare.
Calling on the government to increase investments in public health in areas with lower life expectancy.
Study by ICL published in The Lancet Public Health.
