It got approved (and remained approved even after the General Election which was expected to perhaps change things). It is due to open in 2015 with 240 pupils per year group starting with just a Year 7 class and filling up naturally over the next 5-7 years (so not at full capacity until 2020 or 2022 depending on 6th form arrangements.)
I am no good at links but, if it works, here are the details from when it was approved: http://www.kingston.gov.uk/stp526_kingston_comp.pdf
and the latest news in local paper: http://www.surreycomet.co.uk/education/ ... ol_signed/
There's no doubt it is controversial in terms of the site and size but a North Kingston school is desperately needed. There just aren't enough places and children living there find themselves in a catchment area black hole. Their closest school is Tiffins but Tiffins only takes about 30% of its pupils from the local area, so literally just a handful of children, and then all the other schools are either Richmond Borough linked ones with rules about feeder schools designed to keep Richmond Schools only for Richmond children or are geographically close but not close enough to gain a place eg Coombe Girls which isn't far away but has a teeny catchment area in practice.