You basically have to go thru the HGV, I think you have to start on the smaller trucks (class 2) for so long before you can go for your class one, and then start as a temp, cuz no one will take you on without experiance, the only way to gain experiance is driving for an agency...
Dunno where you've been lookin mate, but the wages per hour (unless you work for a really good company) are piss poor, yes you get paid well, but you have to work for it, i'd say most Drivers, especially while temping yor on 60 to 70 hours a week...