Also, this suggests that things like detailed guides, case studies, worldwide priorities etc. aren't going to be sent to info for local.  is that the case?  Would it be worth having this concern follow the pattern of ``Edition::Translatable``?  (e.g. it defines a can_be_sent_to_govdelivery? that is false, and we then override that in the specific classes we care about to return true.  We'd then change this ``notify_govuk_delivery`` method to have a guard clause that makes it a no-op if can_be_sent_to_govdelivery? is false.)