After a lot of guess work and research I’ve managed to come up with a simple solution.
function column_orderby( $vars ) {
$vars['orderby'] = 'date';
$vars['order'] = 'desc';
return $vars;
}
add_filter( 'request', 'column_orderby' );
This will sort all of the columns by ‘date’ as well as order them by ‘desc’!
Hope it helps anyone in the same situation as me 🙂