Thank-you so much!
Although following the instructions on that page did not work. Creating a new file named “rewrite.script” and placing in the root folder had no effect.
However, following a link from the site you suggested I did find further instructions on this page which did the trick – specifically for Netregistry and noobies like me.
Reading down through the comments I found these instructions:
1. Log in to your console
2. Select “administer domain”
3. Select “webhosting”
4. Enable “Request rewrite support” under webserver options
5. Paste code into text block and click “change”
That worked.