Speaking as a resident nearby the Meteor site:
The site of the old caretakers house for the old Vines school on Forthbridge Road was sold to developers by our smart-thinking council. The decent parcel of land was sold in by wandsworth council in 2011/2012 for £960k.
It now has 2 four bed houses (£1.3m each) and three flats (3bed, 2bed and 1 bed) e.g
http://www.kfh.co.uk/residential-proper ... d/2130810/
Very nice result for the developers!
I recall a certain Mr John Groves expressing surprise and disappointment when I told him this site adjacent to his new school site was to be sold off.
These are 2.5 storey buildings (albeit in keeping with other properties), where only a small 2storey dwelling existed before, so I wouldn't say a plan for another storey on the Meteor street school site would immediately be met with objections.
A more important factor (which sadly, though perhaps understandably the planning system would become the mechanism to vent objection to again) would be that if the Meteor st site were to be expanded in any way, I very much doubt any offer of access to the children of local residents would be proposed.