Thanks, I will look into this, I have a friend who may well be able to get me up to speed with the concepts involved here - always something new to discover and learn to do.
Maybe this could be a plug-in for Events Manager. I'm sure it would be a useful feature to be able to notify site subscribers, registered users and/or an email list of interested persons.
Meanwhile I have decided on a workaround. I have installed a plug-in with which I can email html messages to subscribers and registered users. So I can include a screenshot of the new events as displayed on the site by Events Manager, together with a link to the actual event posting. This is a manual notification system of course, but we don't have too many events to deal with. I am new to WP and am finding it a great tool, flexible, adaptable, with a responsive support network.
Right back to my Dashboard...