The KC will let you know where the nearest ringcraft classes are to you, and the show dates are advertised in the two weekly show papers, Dog World and Our Dogs. :)
I actually telephoned them and asked the details of all the local opens and all the ringcraft classes. They supplied it free of charge and sent it through the post to me if you are going to crufts you can ask at the KC stand and they will do it there and then.
As Jeangenie said there are also dogs world and our dogs which you can order as well.