Nutters fruitcakes and racists?

Cameron's reference to UKIP as "nutters fruitcakes and racists" seems to have become one of his most quoted lines. Yet what took him so long to notice? After all, much of the evidence was already around in the 2004 Britain in Europe publication on UKIP. Click here to see:

http://corbett.pir2.info/assets/docs/briefing/theres-something-about-ukip.pdf