diff --git a/app/assets/error_pages/5xx.html b/app/assets/error_pages/5xx.html
index 25ea83e21..9b13131aa 100644
--- a/app/assets/error_pages/5xx.html
+++ b/app/assets/error_pages/5xx.html
@@ -1,137 +1,130 @@
 <!DOCTYPE html>
-<html lang="en"><!--<![endif]--><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<html lang="en" class="govuk-template ">
+  <head>
+    <meta charset="utf-8" />
+    <title>
+       Sorry, we’re experiencing technical difficulties – GOV.UK Notify
+    </title>
+    <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
+    <meta name="theme-color" content="#0b0c0c" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
 
-    <title>GOV.UK Notify - Internal Server Error</title>
+    <link rel="shortcut icon" sizes="16x16 32x32 48x48" href="/static/images/favicon.ico?de7abc5226925203ac10b0a4a94af949" type="image/x-icon" />
+    <link rel="mask-icon" href="/static/images/govuk-mask-icon.svg?2afd125b1db96109388d4a0727312f3e" color="#0b0c0c"> 
+    <link rel="apple-touch-icon" sizes="180x180" href="/static/images/govuk-apple-touch-icon-180x180.png?a0f7e1b728a42016b247dc54ee40d055">
+    <link rel="apple-touch-icon" sizes="167x167" href="/static/images/govuk-apple-touch-icon-167x167.png?f636cb7d471fc6239d2241d75cbdabcb">
+    <link rel="apple-touch-icon" sizes="152x152" href="/static/images/govuk-apple-touch-icon-152x152.png?40846d46aa37232e2b35065769ce567c">
+    <link rel="apple-touch-icon" href="/static/images/govuk-apple-touch-icon.png?3c45daa1f1e716458e4da954b973002e">
 
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+    <link rel="stylesheet" media="screen" href="/static/stylesheets/main.css?d077f86473501ab244de0b30600536ee" />
+    <!--[if IE 8]><link rel="stylesheet" media="screen" href="/static/stylesheets/main-ie8.css?4638f558599ead1fc571e1657e3f3b7a"/><![endif]-->
+    <link rel="stylesheet" media="print" href="/static/stylesheets/print.css?28010888ca5719dc83d7c2c80f6ed2b2" />
+    <style>
+      .govuk-header__container { border-color: #005EA5 }
+    </style>
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-  <style type="text/css">:root #content > #right > .dose > .dosesingle,
-:root #content > #center > .dose > .dosesingle
-{display:none !important;}</style></head>
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+  </head>
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+    <header class="govuk-header " role="banner" data-module="header">
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+              <svg
+                role="presentation"
+                focusable="false"
+                class="govuk-header__logotype-crown"
+                xmlns="http://www.w3.org/2000/svg"
+                viewbox="0 0 132 97"
+                height="32"
+                width="36"
+              >
+                <path
+                  fill="currentColor" fill-rule="evenodd"
+                  d="M25 30.2c3.5 1.5 7.7-.2 9.1-3.7 1.5-3.6-.2-7.8-3.9-9.2-3.6-1.4-7.6.3-9.1 3.9-1.4 3.5.3 7.5 3.9 9zM9 39.5c3.6 1.5 7.8-.2 9.2-3.7 1.5-3.6-.2-7.8-3.9-9.1-3.6-1.5-7.6.2-9.1 3.8-1.4 3.5.3 7.5 3.8 9zM4.4 57.2c3.5 1.5 7.7-.2 9.1-3.8 1.5-3.6-.2-7.7-3.9-9.1-3.5-1.5-7.6.3-9.1 3.8-1.4 3.5.3 7.6 3.9 9.1zm38.3-21.4c3.5 1.5 7.7-.2 9.1-3.8 1.5-3.6-.2-7.7-3.9-9.1-3.6-1.5-7.6.3-9.1 3.8-1.3 3.6.4 7.7 3.9 9.1zm64.4-5.6c-3.6 1.5-7.8-.2-9.1-3.7-1.5-3.6.2-7.8 3.8-9.2 3.6-1.4 7.7.3 9.2 3.9 1.3 3.5-.4 7.5-3.9 9zm15.9 9.3c-3.6 1.5-7.7-.2-9.1-3.7-1.5-3.6.2-7.8 3.7-9.1 3.6-1.5 7.7.2 9.2 3.8 1.5 3.5-.3 7.5-3.8 9zm4.7 17.7c-3.6 1.5-7.8-.2-9.2-3.8-1.5-3.6.2-7.7 3.9-9.1 3.6-1.5 7.7.3 9.2 3.8 1.3 3.5-.4 7.6-3.9 9.1zM89.3 35.8c-3.6 1.5-7.8-.2-9.2-3.8-1.4-3.6.2-7.7 3.9-9.1 3.6-1.5 7.7.3 9.2 3.8 1.4 3.6-.3 7.7-3.9 9.1zM69.7 17.7l8.9 4.7V9.3l-8.9 2.8c-.2-.3-.5-.6-.9-.9L72.4 0H59.6l3.5 11.2c-.3.3-.6.5-.9.9l-8.8-2.8v13.1l8.8-4.7c.3.3.6.7.9.9l-5 15.4v.1c-.2.8-.4 1.6-.4 2.4 0 4.1 3.1 7.5 7 8.1h.2c.3 0 .7.1 1 .1.4 0 .7 0 1-.1h.2c4-.6 7.1-4.1 7.1-8.1 0-.8-.1-1.7-.4-2.4V34l-5.1-15.4c.4-.2.7-.6 1-.9zM66 92.8c16.9 0 32.8 1.1 47.1 3.2 4-16.9 8.9-26.7 14-33.5l-9.6-3.4c1 4.9 1.1 7.2 0 10.2-1.5-1.4-3-4.3-4.2-8.7L108.6 76c2.8-2 5-3.2 7.5-3.3-4.4 9.4-10 11.9-13.6 11.2-4.3-.8-6.3-4.6-5.6-7.9 1-4.7 5.7-5.9 8-.5 4.3-8.7-3-11.4-7.6-8.8 7.1-7.2 7.9-13.5 2.1-21.1-8 6.1-8.1 12.3-4.5 20.8-4.7-5.4-12.1-2.5-9.5 6.2 3.4-5.2 7.9-2 7.2 3.1-.6 4.3-6.4 7.8-13.5 7.2-10.3-.9-10.9-8-11.2-13.8 2.5-.5 7.1 1.8 11 7.3L80.2 60c-4.1 4.4-8 5.3-12.3 5.4 1.4-4.4 8-11.6 8-11.6H55.5s6.4 7.2 7.9 11.6c-4.2-.1-8-1-12.3-5.4l1.4 16.4c3.9-5.5 8.5-7.7 10.9-7.3-.3 5.8-.9 12.8-11.1 13.8-7.2.6-12.9-2.9-13.5-7.2-.7-5 3.8-8.3 7.1-3.1 2.7-8.7-4.6-11.6-9.4-6.2 3.7-8.5 3.6-14.7-4.6-20.8-5.8 7.6-5 13.9 2.2 21.1-4.7-2.6-11.9.1-7.7 8.8 2.3-5.5 7.1-4.2 8.1.5.7 3.3-1.3 7.1-5.7 7.9-3.5.7-9-1.8-13.5-11.2 2.5.1 4.7 1.3 7.5 3.3l-4.7-15.4c-1.2 4.4-2.7 7.2-4.3 8.7-1.1-3-.9-5.3 0-10.2l-9.5 3.4c5 6.9 9.9 16.7 14 33.5 14.8-2.1 30.8-3.2 47.7-3.2z"
+                ></path>
+                
+                <image src="/assets/images/govuk-logotype-crown.png" xlink:href="" class="govuk-header__logotype-crown-fallback-image" width="36" height="32"></image>
+              </svg>
+              <span class="govuk-header__logotype-text">
+                GOV.UK
+              </span>
+            </span>
 
+            <span class="govuk-header__product-name">
+              Notify
+            </span>
 
+          </a>
         </div>
 
       </div>
     </header>
 
-
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-    <div id="global-header-bar"></div>
-
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-  <div id="content">
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-
-
-    <h1 class="heading-large">
-      Sorry, we’re experiencing technical difficulties
-    </h1>
-    <div class="grid-row">
-      <div class="column-two-thirds">
-        <p>
-          Try again later.
-        </p>
-      </div>
+    <div class="govuk-width-container">
+      <main class="govuk-main-wrapper govuk-!-padding-top-0 govuk-!-padding-bottom-12" id="main-content" role="main">
+        <div class="govuk-grid-row">
+          <div class="govuk-grid-column-full">
+            <h1 class="govuk-heading-l govuk-!-padding-top-7">
+              Sorry, we’re experiencing technical difficulties
+            </h1>
+            <p>
+              Try again later.
+            </p>
+          </div>
+        </div>
+      </main>
     </div>
 
-  </main>
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-    <footer class="group js-footer" id="footer" role="contentinfo">
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-          <div class="footer-meta-inner">
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-  <nav class="footer-nav">
-    Built by the <a href="https://www.gov.uk/government/organisations/government-digital-service">Government Digital Service</a>
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-              <p class="logo"><a href="https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/" rel="license">Open Government Licence</a></p>
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-                <p>All content is available under the <a href="https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/" rel="license">Open Government Licence v3.0</a>, except where otherwise stated</p>
+    <footer class="govuk-footer " role="contentinfo">
+      <div class="govuk-width-container ">
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+          <div class="govuk-footer__meta-item govuk-footer__meta-item--grow">
 
+            <h2 class="govuk-visually-hidden">Support links</h2>
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+            <svg
+              role="presentation"
+              focusable="false"
+              class="govuk-footer__licence-logo"
+              xmlns="http://www.w3.org/2000/svg"
+              viewbox="0 0 483.2 195.7"
+              height="17"
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+              <path
+                fill="currentColor"
+                d="M421.5 142.8V.1l-50.7 32.3v161.1h112.4v-50.7zm-122.3-9.6A47.12 47.12 0 0 1 221 97.8c0-26 21.1-47.1 47.1-47.1 16.7 0 31.4 8.7 39.7 21.8l42.7-27.2A97.63 97.63 0 0 0 268.1 0c-36.5 0-68.3 20.1-85.1 49.7A98 98 0 0 0 97.8 0C43.9 0 0 43.9 0 97.8s43.9 97.8 97.8 97.8c36.5 0 68.3-20.1 85.1-49.7a97.76 97.76 0 0 0 149.6 25.4l19.4 22.2h3v-87.8h-80l24.3 27.5zM97.8 145c-26 0-47.1-21.1-47.1-47.1s21.1-47.1 47.1-47.1 47.2 21 47.2 47S123.8 145 97.8 145"
+              />
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