Hi guys
Just thought I would report back.
I found a plugin called TurboCSV ($50) which (with the help of the Chris Richardson the developer) I managed to get to work with ACF.
I had to do quite a lot of testing but I found that if you name the csv column the same name as your ACF custom field, it should map itself automatically when it uploads.
Other than that, the plugin works a dream and is incredibly reliable.
Hope this post is useful to others
