Thanks for the advice, guys. I normally use Meguiar's Gold Class shampoo, two buckets and wash mitts (separate old one for the wheels), SRP (occasionally) and P21S or Dodo Juice wax. I am just about to try clay for the first time, and I thought i would go for the Meguiar's kit.
I am also wondering about using a cheap Halfords polisher I have had in the garage for years and which has never really been used. I know you will probably all say to get a Porter Cable and learn how to use it properly, but is it worth trying the cheap alternative? Or would it be just as well to polish and wax by hand?