Thanks all. Have spent the weekend playing with content controls and to be honest have had limited success so still much to learn for me.

Have read Gregory Maxey's site on repeating data and his significant info on content controls. I had some problems mapping controls to existing nodes in XMLCustomParts and inconsistency in update throughout the document. Content controls are definitely the way for me to go, but some more reading yet.

Going to use DocVariables in the short term (data is really only repeated on front page and in headers) until I read more into both XML and get a better understanding of the content control. Thanks for all the pointers to date.