Hi Rupert,
Thanks so much for reaching out!
Just to let you know, we are limited by our Support Policy in how much we can help with customizations, but I will try to point you in the right direction.
A great place to start would be our Themer’s Guide, which can show you which templates and views that you can edit. You’ll want to take a look at the single events template for this purpose.
https://theeventscalendar.com/knowledgebase/themers-guide/
If this functionality is a requirement for your intended project, I’d suggest that a third-party developer would be the best way to make this feature happen on a short timeline. ? We maintain a list of developers who work with our plugins on our Knowledgebase here:
https://theeventscalendar.com/knowledgebase/find-a-customizer/
Let me know how it goes and if you have any other questions!
Thanks,
Jaime