Go to the footer of each document and click “page numbering” in the insert ribbon, and in the menu select “format page numbers”; at the bottom of the dialog box, click “start at”, and put the initial number for that document.

Many thanks, I will try that later today, when the Grandchildren have gone to school.

All the years of searching for a solution to this problem, put a post on the forum and a couple of hours later and it is solved. Once again, many thanks for your help.