Hi Graham,
I believe that the dashboard's export/import function only copies content, and not settings, so it's not suitable for making a replica of the site. We sell an add-on for migrations (http://updraftplus.com/shop/migrator/). Alternatively, if you moved to shared hosting on our sister company (http://www.simbahosting.co.uk), then they'd clone the site for you without extra charge (above the hosting, that is).
David