@ChrisMillward - how did you create the csv? If you used Excel, then which version?
Recent versions have a (not always easy to find) option to save a CSV in UTF-8, see ==>>
Excel: UTF-8 Encode . This is the easy-to-find option in the current version:
The
Import List plugin has been maintained by davidfor to maintain compatibility with the calibre core (see plugin's Version History).
Moderator Notice
I'm going to move this thread into the Import List thread
BR