diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/errors/401.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/errors/401.tt
index aa421d731b..5c0d3cf686 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/errors/401.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/errors/401.tt
@@ -17,7 +17,8 @@
     <h1>An error has occurred!</h1>
     <h2>Error 401</h2>
     <ul style="margin-bottom: 1em; padding-bottom: 1em; border-bottom: 1px solid #CCC;">
-        <li>This error means that you aren't authorized to view this page</li>	
+        <li>This error means that you aren't authorized to view this page.</li>
+        <li>Please <a href="/cgi-bin/koha/mainpage.pl">log in</a> and try again.
         <li>To report this error, you can <a href="mailto:[% admin %]">email the Koha administrator</a>.</li>
         <li>Use top menu bar to navigate to another part of Koha.</li>
     </ul>
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/errors/403.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/errors/403.tt
index 66dc92dc3a..6ed5c3a19a 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/errors/403.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/errors/403.tt
@@ -17,7 +17,7 @@
     <h1>An error has occurred!</h1>
     <h2>Error 403</h2>
     <ul style="margin-bottom: 1em; padding-bottom: 1em; border-bottom: 1px solid #CCC;">
-    <li>This error means that the link was broken and that the page doesn't exist</li>	
+    <li>This error means that you are forbidden to view this page.</li>
     <li>To report this error, you can <a href="mailto:[% admin %]">email the Koha administrator</a>.</li>
     <li>Use top menu bar to navigate to another part of Koha.</li>
     </ul>
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/errors/404.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/errors/404.tt
index d461462a6e..422aba3aa7 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/errors/404.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/errors/404.tt
@@ -15,11 +15,18 @@
 	<div id="yui-main">
 	<div class="yui-b"><div class="yui-g">
     <h1>An error has occurred!</h1>
-    <h2>Error 404</h2>
-    <ul style="margin-bottom: 1em; padding-bottom: 1em; border-bottom: 1px solid #CCC;">
-        <li>This error means that the link was broken and that the page doesn't exist</li>	
-        <li>To report this error, you can <a href="mailto:[% admin %]">email the Koha administrator</a>.</li>
-        <li>Use top menu bar to navigate to another part of Koha.</li>
+    <h3><em>Error 404</em></h3>
+        <h3>This message may have been caused by any of the following reasons:</h3>
+        <ul style="padding-bottom: 0.5em;">
+            <li>You made use of an external link to an item that is no longer available</li>
+            <li>You followed an outdated link e.g. from a search engine or a bookmark</li>
+            <li>You tried to access a page that needs authentification</li>
+            <li>An internal link in the client is broken and the page does not exist</li>
+        </ul>
+        <h3>What's next?</h3>
+        <ul style="margin-bottom: 1em; padding-bottom: 1em; border-bottom: 1px solid #CCC;">
+            <li>Use top menu bar to navigate to another part of Koha.</li>
+            <li>To report a broken link or any other issue, please send an <a href="mailto:[% admin %]">email to the Koha Administrator</a></li>
     </ul>
 </div>