well...... I have just called the IAA on the number given by dublinpilot and talked to licensing standards. They have just told me that night flight is allowable in Ireland without an IR rating!
They said what was the point of there being a seperate JAR night rating if no one could actually fly on it unless they also had an IR?
I have been given the email address of the head of JAR licensing and I am about to email him directly and ask him to make public comment.
I will keep you updated!!