seeker I agree that social mobility will hardly improve under DC et al. But then again, it didn't improve under Blair/Brown when there was huge financial commitment and more importantly the will to make a change.
The reality it seems, is that social mobility does not follow government policy, but is more likely affected by individualised and direct initiatives.
The widening access prog at Oxbridge is a good example of this. There is so much going on; school liason, community liason, mentoring, fundraising...
Much of this could be done to encourage disadantged students to apply to GS too.
As for the disadvantages on the general populace where there are selective schools, well what actually are they? It seems to me that disadvantaged DC do badly in society whether they attend comprhensives or secondary moderns. You talk about social separation in GS areas, yet there is just as much social separation in comprehensive areas.
The reality is this is sadly what the UK is like. Grammar schools are not causing it and comprehensives are not fixing it!