Add read more link to custom excerpts

add_link_to_custom_excerpts

// Add excerpt link to custom excerpts

function add_read_more_to_custom_excerpts($excerpt) {
	// set up the global post variable
	global $post;
	if ( !empty( $post->post_excerpt ) ) {
		$excerpt = $excerpt . '<br/><a href="' . get_permalink() . '">&gt; Read more</a>'; // change this to suit your theme
	}
	return $excerpt;
}
add_filter('get_the_excerpt', 'add_read_more_to_custom_excerpts', 11); // I needed to use priority 11 as I was using another excerpt filter