Thanks for your reply, John.
Yes, I’m aware WP does not natively support taxonomies for users. I know it can be done, though, as LH User Taxonomies does it. Both that plugin and the ACF functions that save and load terms are based on Justin Tadlock’s article on user taxonomies as far as I’m aware.
I guess I’ll need to study the code for LH User Taxonomies to try to find the answer. I’m not hugely experienced with PHP hence I was hoping ACF would do the work for me! Another option would be to use the plugin, but there’s load of stuff I don’t want in there, and besides, I really like the ACF category chooser field…
