Woah, that still doesn't make sense. The person who signs up for the email alert is not likely to be the same person who publishes the document. It would be better to say "given someone signed up to alerts about X, when a document is published for X, then the person gets an alert" and then a separate feature saying "When someone signs up for X, then govuk_delivery is notified of the signup"

We shouldn't need to reflect the implementation concerns in the ordering or wording of the cucumber feature.