Thanks Paul, even though your first thought was 'bollocks' when you saw this it seems!
I had used a lomo-esk PP on this, 3 curves layers, red,green and blue, a gradiant map set to soft light and a vibrancy layer. When I do that I tend to use a heavier then normal vignette and I'm pretty comfortable with it, although I didn't really notice the sky so much till you said but I like the way it looks on the grass.
Vic