Thank you @HappyasLaura that website is very useful! I appreciate it. I gotta say half are on free school meals at Colai. Will look more at all those figures thanks to you.
And @Terentia hahaha! Sorry! I don't want to be 'that mum' asking for advice with an already made up mind and thank you for still chatting to me on here 
I'm just trying to marry up the fact that there's this school with robust funding and full, glowing support by Islington Council (I called them yesterday) and full backing by the City of London, this school seems to be well connected.
It has a new building (sure, that fence! But let's compare it to Central Foundation), Colai has a state of the art gym and a leadership team that appears to have worked their buns off for the outstanding Ofsted report.
Yet, the Islington mums aren't even looking at it, holding onto the old reputation of the school in its previous incarnation and because of worry about mixing in the wrong circles.
But I get the impression that this school has a chance to continue the recent ascend and I hope that more middle class parents would send their kids there, and this vicious cycle will be broken and exam results will be up too.
And think about how great that would be for your area 
We're considering the school strongly. And that brings me to the point, yes, I think I am defending it a little bit, but also because it's our only option right now.
Because frankly, I'd rather send my child there than fork out for a back up independent school or leave them at their prep with nowhere lined up in YR9.
What a few days. So anyone wrecking about schools right now, I wish you lots of luck.