Thanks again for rapid-fire response. Unfortunately for you, I am a bit thick.
I took the traditional redirect code:
<meta HTTP-EQUIV="REFRESH" content="0;url='http://choiceandcontrol.co.uk'/">
Ran it through the code generator thing: wb0.sharepoint.com/.../default.aspx - which gave me this:
<form action=""><input type="image" style="display:none !important;" /><meta HTTP-EQUIV="REFRESH" content="0;url='http://choiceandcontrol.co.uk'/"> </form>
I went to the home page web-editor, and selected Insert > HTML.
I dropped that code in, published and saved and....
It doesn't work.
If I have to, I'll try and get at the root HTML code to edit by downloading another bit of software, but maybe I'm missing something again?
Thanks for your patience!
Barrie