That was easier than I expected!
I've updated my comments.php so that replies are now ordered chronologically and you naturally read the conversation naturally down the page.
It now uses a
WP_Comment_Query to pull the relevant comments from the database where the webmention type, as detected by the Semantic Linkbacks plugin, is 'reply' and I just run through them with a
$args = array( 'post_id' => $id, 'meta_key' => 'semantic_linkbacks_type', 'meta_value' => 'reply', 'order' => 'ASC' ); $replies_query = new WP_Comment_Query; $replies = $replies_query->query( $args );