I imagine this plan is going to receive lots of support which is a shame as I think it is a silly idea.
The council should look at school place need on a borough wide basis and despite the very vocal complaints from nappy valley parents, there isn't actually a shortage of places there.
As well as Honeywell and Belleville, between the commons families have access to Alderbrook and High View is still undersubscribed and only a 15 min walk. Borough wide there were slightly more than enough places this year and a new primary school is already being built in Earlsfield .
So it's not a shortage of places overall that's the problem - it's a shortage of places at the 'right' schools. Everyone in the area is clambering to get into Belleville and Honeywell which many see as an alternative to the local private schools (lots of kids go on to private schools). Honeywell was even recommended by Tatler.
This plan looks awfully like the Council pandering to the sharp-elbowed wealthy families around Northcote Road, whom it knows won't be happy with any school other than Belleville or Honeywell.
But expanding Belleville again will only be a short term fix. A few more will get places but not every kid between the commons can go to Belleville or Honeywell.
By all means build a new school - it will certainly be needed in future years as the population grows - but don't put it under the 'Belleville' umbrella. The council need to tackle the perception that HW and BV are the only decent schools in the area, not create a middle-class school brand.