Have we been here before?
How many initiatives have been pioneered to solve what are effectively London problems suffered by government ministers and the influential?
Giving every school the full ability range could work wonders, though expect tales of middle-class kids being coached to do badly in tests, or housing booms on rundown estates. But to work it needs middle-class acquiescence and the current punitive tone - that such parents are fiddling the system - is counterproductive. In the short term, they must be wooed: longer term, all local schools must be good.