The so-called "Open-Shows" are not counting. A dog can earn Challenge Certificates only at Champion-Shows. Each year the English Kennel Club decides, how many pairs (for male and bitch) of certificates may be awarded for each breed, therefore it may happen that on a Champion-Show no certificate can be awarded. Certainly there is always a Reserve.
A dog needs 3 certificates from 3 different judges, one of them must be awarded at an age of minimum 12 months. Please note: In England exists no champion class, all champions have to start in open class!
Multiple entries in different classes are possible.