diff --git a/app/templates/error/404.html b/app/templates/error/404.html
index 721457e0b..d19125683 100644
--- a/app/templates/error/404.html
+++ b/app/templates/error/404.html
@@ -3,8 +3,12 @@
 {% block fullwidth_content %}
     <div class="grid-row">
       <div class="column-two-thirds">
-        <h1>404</h1>
-        <p>Sorry, that page doesn't exist.</p>
+        <h1 class="heading-xlarge">
+          Page could not be found
+        </h1>
+        <p>
+          Check you've entered the correct web address.
+        </p>
       </div>
     </div>
 {% endblock %}
diff --git a/app/templates/error/500.html b/app/templates/error/500.html
index 66fd970e4..1401cfc53 100644
--- a/app/templates/error/500.html
+++ b/app/templates/error/500.html
@@ -3,8 +3,10 @@
 {% block fullwidth_content %}
     <div class="grid-row">
       <div class="column-two-thirds">
-        <h1>500</h1>
-        <p>Sorry, something went wrong on our system.</p>
+        <h1 class="heading-xlarge">
+          Sorry, we're experiencing technical difficulties
+        </h1>
+        <p>Try again later.</p>
       </div>
     </div>
 {% endblock %}