Next week David Davis will launch a taskforce to examine the recent fall in social mobility - and find ways to reverse it.

BBC: NEWS | UK | UK Politics | In full: Cameron speech

The bigger picture of the Excellence in Cities' work in schools, says the minister, is to find ways to reverse generations of educational underachievement in the inner-cities.

BBC: Plugging council estate into school

But politicians and policymakers may not find it easy to reverse the trend of the past 30 years.

BBC: The Wealth Gap - Inequality in Numbers