Thanks again for the help. I just tried this locally again using MAMP this time and it works (on all browsers!) - meaning I can see the page you linked to in your last comment.
What's weird is that when I upload index.html and flare.json to the FTP server that fasthosts have provided me with, I get the same problem of a completely blank page. Perhaps my hosting doesn't allow this?
Oh well, at least I have a way of playing with this now. Any further thoughts on the remote server problem would be appreciated though!