Hi Lee!
Thanks for getting in touch with us!
With Event Aggregator you can import from any iCalendar format feed. The link you shared seems to be an actual iCalendar feed and I have just tested on a local installation and it is possible to import from it using Event Aggregator.
Could you explain how I can do this and do I need PRO to be able to provide an iCal sync option
You don’t need Events Calendar PRO to import events from that source, but instead an Event Aggregator license. Bear in mind, that there is no sync functionality really, It provides an import functionality as Event Aggregator does not push events to another source.
You can learn more about importing events from a feed or other URL in the following article > https://theeventscalendar.com/knowledgebase/import-from-feed-or-url/
I hope that helps. Let me know if any follow up questions 🙂
Best,
Victor