Index: src/wp-includes/formatting.php
===================================================================
--- src/wp-includes/formatting.php	(revision 37241)
+++ src/wp-includes/formatting.php	(working copy)
@@ -2906,6 +2906,8 @@
 		 * @param int $number The number of words. Default 55.
 		 */
 		$excerpt_length = apply_filters( 'excerpt_length', 55 );
+
+		$more_string = ' […]';
 		/**
 		 * Filter the string in the "more" link displayed after a trimmed excerpt.
 		 *
@@ -2913,7 +2915,16 @@
 		 *
 		 * @param string $more_string The string shown within the more link.
 		 */
-		$excerpt_more = apply_filters( 'excerpt_more', ' ' . '[…]' );
+		$excerpt_more = apply_filters( 'excerpt_more', $more_string );
+
+		// add a more accessible default including a link if the `excerpt_more` filter is not used.
+		if ( $more_string === $excerpt_more ) {
+			$excerpt_more = ' <a href="' . get_permalink() . '" class="more-link">' . sprintf(
+				__( '<span class="screen-reader-text">Continue reading %s</span><span aria-hidden="true">[&hellip;]</span>' ),
+				get_the_title()
+			) . '</a>';
+		}
+
 		$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
 	}
 	/**
Index: src/wp-includes/post-template.php
===================================================================
--- src/wp-includes/post-template.php	(revision 37241)
+++ src/wp-includes/post-template.php	(working copy)
@@ -263,7 +263,11 @@
 	$post = get_post();
 
 	if ( null === $more_link_text )
-		$more_link_text = __( '(more&hellip;)' );
+		/* translators: %s: Name of current post */
+		$more_link_text = sprintf(
+			__( '<span class="screen-reader-text">Continue reading %s</span><span aria-hidden="true">(more&hellip;)</span>' ),
+			get_the_title()
+		);
 
 	$output = '';
 	$has_teaser = false;