Please ignore – I then found that no ajax calls were working at all if not logged in, and it was due to me having put a certain block in place for any non-admin user
Thanks for the help so far – I’m still getting the same issue (have completely cleared & disabled the cache via plugin and from the server
e.g. https://dartmoorsociety.com/events/a-walk-along-the-archangels-way/
