[@leo-l Participant 9 years, 3 months ago]

Ok so not sure this is the best approach but it seems to work well.

// Run query to get all the published replies for the topic
$widget_query = new WP_Query( array(
			'post_type'           => bbp_get_reply_post_type(),
			'post_parent'		  => bbp_get_topic_id(),
			'ignore_sticky_posts' => true,
			'no_found_rows'       => true,
			'post_status'		  => 'publish',
		) );

// Get the replies per page setting value and the count of the total replies + 1 for the initial topic
$posts_per_page = get_option('_bbp_replies_per_page');
$total_posts = $widget_query->post_count + 1;

// if the total replies is greater than the per page setting pagination is used so need to structure url with page number
if($total_posts > $posts_per_page)
{
	// Work out last page number and build url using topic link and last reply id
        $total_pages = ceil($total_posts/$posts_per_page);
	$url = bbp_get_topic_permalink()."page/".$total_pages."/#post-".$widget_query->posts[0]->ID;
}else{
	// Same url as above but without page number as not needed
        $url = bbp_get_topic_permalink()."#post-".$widget_query->posts[0]->ID;
}

I then added the following where i wanted to place the link

if ( $widget_query->have_posts() ) {
	echo "<a href=\"".$url."\">Go to latest post</a>";
}