Thanks dudesndolls and khemerakh (and all previous) – all has been resolved. As suspected, my lack of knowledge was my problem!
Sounds like you’re right – on chat with support now. Thank you both for your help!
Hi Tara, many thanks for your help. Unfortunately, no index.html there. It almost feels like its picking up the files from a different location to those that I’m changing, is that possible? I only say so, as the host landing page hasn’t changed throughout my trail and error-ing.