Well, I went with a company called Vision in St. Albans and they were really good. The CBT test isn't changing I dont think - just the DAS and maybe the bike test too.
Vision give you a bike, helmet and gloves. I wore jeans/thick coat on the day as I didn't have leather gear. Although my coat was leather my jeans I'm sure wouldn't last long if I fell off at any speed. Still... I didn't fall off so all is right with the world.
You can pass the CBT in one day if you've never seen a bike before ( I did ) but it is a long day and you really need to push your self ( atleast I had to, you might pick it up easier! )