This year after seven or so years of showing I have judged my first two opens shows, before doing so I passed the judging seminars, including 2 breed seminars. (where these take place is shown on the KC website I believe) I then got in touch with the breed council and Cocker club to see if I had their support to be added to their C list. Then it was a case of waiting to be asked by a club.
I hope this helps
Sarah