diff --git a/app/assets/javascripts/cookieMessage.js b/app/assets/javascripts/cookieMessage.js
new file mode 100644
index 000000000..4e17cbec7
--- /dev/null
+++ b/app/assets/javascripts/cookieMessage.js
@@ -0,0 +1,16 @@
+(function () {
+  "use strict";
+
+  var root = this;
+  if(typeof root.GOVUK === 'undefined') { root.GOVUK = {}; }
+
+  GOVUK.addCookieMessage = function () {
+    var message = document.getElementById('global-cookie-message'),
+        hasCookieMessage = (message && GOVUK.cookie('seen_cookie_message') === null);
+
+    if (hasCookieMessage) {
+      message.style.display = 'block';
+      GOVUK.cookie('seen_cookie_message', 'yes', { days: 28 });
+    }
+  };
+}).call(this);
diff --git a/app/assets/javascripts/govuk/cookie-functions.js b/app/assets/javascripts/govuk/cookie-functions.js
new file mode 100644
index 000000000..fdabe48e3
--- /dev/null
+++ b/app/assets/javascripts/govuk/cookie-functions.js
@@ -0,0 +1,62 @@
+(function () {
+  "use strict";
+
+  var root = this;
+  if(typeof root.GOVUK === 'undefined') { root.GOVUK = {}; }
+
+  /*
+    Cookie methods
+    ==============
+
+    Usage:
+
+      Setting a cookie:
+      GOVUK.cookie('hobnob', 'tasty', { days: 30 });
+
+      Reading a cookie:
+      GOVUK.cookie('hobnob');
+
+      Deleting a cookie:
+      GOVUK.cookie('hobnob', null);
+  */
+  GOVUK.cookie = function (name, value, options) {
+    if(typeof value !== 'undefined'){
+      if(value === false || value === null) {
+        return GOVUK.setCookie(name, '', { days: -1 });
+      } else {
+        return GOVUK.setCookie(name, value, options);
+      }
+    } else {
+      return GOVUK.getCookie(name);
+    }
+  };
+  GOVUK.setCookie = function (name, value, options) {
+    if(typeof options === 'undefined') {
+      options = {};
+    }
+    var cookieString = name + "=" + value + "; path=/";
+    if (options.days) {
+      var date = new Date();
+      date.setTime(date.getTime() + (options.days * 24 * 60 * 60 * 1000));
+      cookieString = cookieString + "; expires=" + date.toGMTString();
+    }
+    if (document.location.protocol == 'https:'){
+      cookieString = cookieString + "; Secure";
+    }
+    document.cookie = cookieString;
+  };
+  GOVUK.getCookie = function (name) {
+    var nameEQ = name + "=";
+    var cookies = document.cookie.split(';');
+    for(var i = 0, len = cookies.length; i < len; i++) {
+      var cookie = cookies[i];
+      while (cookie.charAt(0) == ' ') {
+        cookie = cookie.substring(1, cookie.length);
+      }
+      if (cookie.indexOf(nameEQ) === 0) {
+        return decodeURIComponent(cookie.substring(nameEQ.length));
+      }
+    }
+    return null;
+  };
+}).call(this);
diff --git a/app/assets/javascripts/main.js b/app/assets/javascripts/main.js
index 10d0b2a50..3f9166828 100644
--- a/app/assets/javascripts/main.js
+++ b/app/assets/javascripts/main.js
@@ -1,5 +1,7 @@
 window.GOVUKFrontend.initAll();
 
+$(() => GOVUK.addCookieMessage());
+
 $(() => $("time.timeago").timeago());
 
 $(() => GOVUK.stickAtTopWhenScrolling.init());
diff --git a/app/assets/stylesheets/components/cookie-message.scss b/app/assets/stylesheets/components/cookie-message.scss
new file mode 100644
index 000000000..559e07bbf
--- /dev/null
+++ b/app/assets/stylesheets/components/cookie-message.scss
@@ -0,0 +1,8 @@
+.notify-cookie-message {
+  @include govuk-font($size: 16);
+  padding: govuk-spacing(3) 0;
+
+  .js-enabled & {
+    display: none;
+  }
+}
diff --git a/app/assets/stylesheets/main.scss b/app/assets/stylesheets/main.scss
index a5dcef4ac..d415fbda5 100644
--- a/app/assets/stylesheets/main.scss
+++ b/app/assets/stylesheets/main.scss
@@ -37,6 +37,7 @@ $path: '/static/images/';
 // Specific to this application
 @import 'globals';
 @import 'grids';
+@import 'components/cookie-message';
 @import 'components/site-footer';
 @import 'components/placeholder';
 @import 'components/sms-message';
diff --git a/app/templates/admin_template.html b/app/templates/admin_template.html
index 3152a60d5..c69abfb15 100644
--- a/app/templates/admin_template.html
+++ b/app/templates/admin_template.html
@@ -25,11 +25,15 @@
    {% block per_page_title %}{% endblock %} – GOV.UK Notify
 {% endblock %}
 
-{% block cookie_message %}
-  <p>
-    GOV.UK Notify uses cookies to make the site simpler.
-    <a href="{{ url_for("main.cookies") }}">Find out more about cookies</a>
-  </p>
+{% block bodyStart %}
+  {% block cookie_message %}
+    <div class="notify-cookie-message">
+      <p class="govuk-width-container">
+        GOV.UK Notify uses cookies to make the site simpler.
+        <a href="{{ url_for("main.cookies") }}">Find out more about cookies</a>
+      </p>
+    </div>
+  {% endblock %}
 {% endblock %}
 
 {% block header %}
diff --git a/gulpfile.js b/gulpfile.js
index 9b790fc52..aeb0b19af 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -85,6 +85,8 @@ const javascripts = () => {
   return src([
       paths.toolkit + 'javascripts/govuk/modules.js',
       paths.toolkit + 'javascripts/govuk/show-hide-content.js',
+      paths.src + 'javascripts/govuk/cookie-functions.js',
+      paths.src + 'javascripts/cookieMessage.js',
       paths.src + 'javascripts/stick-to-window-when-scrolling.js',
       paths.src + 'javascripts/detailsPolyfill.js',
       paths.src + 'javascripts/apiKey.js',