The "big society" - the idea that volunteers should take over some of the functions of the state - is the most over-used policy phrase of the moment. But how will the theory work in practice?

Chris Bowlby looks at the big society on the ground in Oxford - from the affluent streets of the City's North to the deprived estates of Blackbird Leys - and tries to figure out the consequences of expecting communities to do more for themselves.