The general environment of my primary school (Loughborough) was great, but it had really poor SATs results. My secondary school (Stockwell Park) was a sink school and fucking awful in all areas.
I think that seems to be the way in Lambeth in general, the Primary schools are pretty adequate, some of the church schools very very good.
The problems come at Secondary level.
I'm another ex "Stockwell Parker", the school was shit when I went back in the early 90's, I hear it's still pretty ropey now even though big investments have been made.