You can apply to join as many counties as you like. Each county you apply for will increase your monthly membership by £12 per month. So for example, if you apply for one county you will pay £12 per month, two counties will cost you £24 per month, and so on.
Each county is limited to 50 spaces per category (photographer, florists, planners, etc) and if the county is full you will be added to the waiting list. As soon as a space becomes available for your category in that county you will be notified by email.