This is a bit of a worry in terms of social mobility and proximity to average/poor institutions. To my knowledge at the moment, not too many places are that keen on doing anything practical about it. I'd be interested to see the stats of how many WP and 1st gen locals apply and get offers for our place this year. If this is right then I'd expect a large upturn.
My experience has been that many institutions talk a good game re disadvantaged backgrounds, but they are almost never prepared to put their money where their mouth is. Indeed, it is a fight I have with my own institution each year.