Hello Mark Jones.
In order to create the exact copy of your desired page you need to make the following steps:
After you will enter your Control Panel please choose the desired page, which you wish to duplicate using Current Section: "page's name".
When you've entered the desired page, please press on "File" - "Duplicate page". Now you have two similar pages. I've attached a screen shot in order to be more specific.
Please contact us back if you will need our further help.