A report's warning there's a 'postcode lottery' when it comes to life chances for Britain's young people.
The government's Social Mobility Commission's found coastal, rural and former industrial areas are being 'left behind', with lower, pay fewer jobs and long commuting times.
It says North Hertfordshire is one of the best places for youngsters one year after GCSEs, compared to one area of Lancashire.
Just one percent of so-called NEETs in North Herts are 'not in education, employment or training - while it's 25 percent in South Ribble.
The report concludes that Westminster is the best place for disadvantaged children and young people to progress - west Somerset is the worst.
At the heart of the report is the Social Mobility Index, which ranks all 324 local authorities in England in terms of their social mobility prospects for someone from a disadvantaged background. It uses a range of 16 indicators for every major life stage, from early years through to working lives, to map the nation's social mobility hotspots and coldspots.
The Rt Hon Alan Milburn, chair of the Social Mobility Commission, said: "The country seems to be in the grip of a self-reinforcing spiral of ever-growing division. That takes a spatial form, not just a social one. There is a stark social mobility lottery in Britain today.
London and its hinterland are increasingly looking like a different country from the rest of Britain. It is moving ahead, as are many of our country's great cities. But too many rural and coastal areas and the towns of Britain's old industrial heartlands are being left behind economically and hollowed out socially.
Tinkering around the edges will not do the trick. The analysis in this report substantiates the sense of political alienation and social resentment that so many parts of Britain feel. A new level of effort is needed to tackle the phenomenon of left-behind Britain. Overcoming the divisions that exist in Britain requires far more ambition and far bigger scale.
A less divided Britain will require a more redistributive approach to spreading education, employment and housing prospects across our country".