Here's the link:
Yep... that one again!
Screen shots attached showing how I've set up the shipping rules. I have created two only so far... one for USA and one for UK, and even though I am testing a delivery to the UK, I am not getting a price for it appear.
For it to be wrong in two places, one being a completely virgin install of PS4.5, I assume it is something I am doing wrong, but I can't see what.