What you're seeing there is a near perfect correlation between distance from London by train, and inequality. The further away you are from the capital, the more equal your city is.
Life expectancy in the south-east is 79.7 for males and 83.5 for females, while in the north-west it stands at just 77.9 for males and 81.1 for females.Although life expectancy has grown in every region of the UK over the past four years, in some areas the growth has been considerably faster than in others.Growing differences appear to reflect increasing wealth in the South - particularly in the capital.
Many of the risk factors for mental illness are linked to deprivation, so a general pattern occurs with the three northern regions (North East, North West and Yorkshire & Humber), showing worse measures than the three southern regions (South East, South West and Eastern England) and the two midlands regions (West Midlands, East Midlands) in between.
But the really interesting question is whether you want to reduce urban inequality. The "Spirit Level" argument – that high inequality causes a number of bad outcomes – has only been shown to apply on the national level. Is there anything bad about inequality in cities on its own terms?