OK I got some more info on this from my dealer after having a rant last night!
Non Approved cars come with 3 months warrenty.
Approved cars have it bumped up to 12 months. Apparently all approved means is they do a few tests (history, milage, HPI etc), a check over (and service if needed), and the extra warrenty. Apparently this extra warrenty costs them more than it does to sell the aftermarket one to bump it up to 12 months and that is why my car wasnt an approved car. All the other checks were carried out.
Not sure how much of that is BS, but thats what I was told.