Thanks, Marco. Well, it at least helps to update me to a non-obsolete sexp method.
I have no idea how to check what's actually been pushed to `appt` to see whether the updated org-class really behaves differently to org-diary-class in this respect. (So I'll have to see tomorrow how `appt` behaves.) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr Benjamin Slade pgp fingerprint: 21BA 2AE1 28F6 DF36 110A 0E9C A320 BBE8 2B52 EE19 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {sent by mu4e on Emacs running under GNU/Linux} (Choose Linux, Choose Freedom)