Hi Simon,
There are two ways you can modify the venue page layout:
1. Via CSS – you can simply target whatever elements you want in your themes style.css file.
2. Via a template override of the single venue view. If you want to go this route simply make a copy of /wp-content/plugins/events-calendar-pro/views/single-venue.php and place in an ‘events’ folder in your active theme. Then, you can make whatever changes you want to the markup or PHP.
I hope that helps!
– Jonah