try and trace
where the white twin and earth cable goes (could go to the switch)
where the green/yellow, blue and the red-or-brown-whatever-it-may-be wire goes. i'm not clear if this is to be connected up or not. try and work out what it's for (outside light, loft light, tv booster, nothing at all, who knows).
The white does go to the switch from what I can see, I have a feeling that the ther one may be the plug socket somehow, all the other cables have a grey coat around them so its hard to trace them..