Ok, I’ve found the offending line of code:
\wp-content\plugins\the-events-calendar\src\Tribe\List_Widget.php line 133
Without further investigation I’m not sure why this screws it up but, commenting out
//wp_reset_query();
Prevents all the event details being rendered underneath the VC block.
The Advanced list (PRO) inherits from the List_Widget
Any ideas on that ?