No problem - glad to help. If you download a form from the website I gave, you will see that, strangely, there is no place to put the reference number.
Perhaps someone here can clear this up - is it true that it's cheaper if you include the reference number? If so, where do you squeeze it in? Is it also true that you need to state on the form that you want the names of the parents included, otherwise they may not do so?