diff --git a/app/templates/views/notifications/check.html b/app/templates/views/notifications/check.html
index e9f65c00d..19c5d34e4 100644
--- a/app/templates/views/notifications/check.html
+++ b/app/templates/views/notifications/check.html
@@ -1,5 +1,5 @@
 {% extends "withnav_template.html" %}
-{% from "components/radios.html" import radio_select %}
+{% from "components/banner.html" import banner_wrapper %}
 {% from "components/message-count-label.html" import message_count_label %}
 
 {% block service_page_title %}
@@ -8,17 +8,31 @@
 
 {% block maincolumn_content %}
   {% if error == 'not-allowed-to-send-to' %}
-    {% with
-      count_of_recipients=1,
-      template_type_label='phone number'
-    %}
-      {% include "partials/check/not-allowed-to-send-to.html" %}
-    {% endwith %}
+    <div class="bottom-gutter">
+      {% call banner_wrapper(type='dangerous') %}
+        {% with
+          count_of_recipients=1,
+          template_type_label=(
+            'phone number' if template.template_type == 'sms' else 'email address'
+          )
+        %}
+          {% include "partials/check/not-allowed-to-send-to.html" %}
+        {% endwith %}
+      {% endcall %}
+    </div>
   {% elif error == 'too-many-messages' %}
-    {% include "partials/check/too-many-messages.html" %}
+    <div class="bottom-gutter">
+      {% call banner_wrapper(type='dangerous') %}
+        {% include "partials/check/too-many-messages.html" %}
+      {% endcall %}
+    </div>
   {% elif error == 'message-too-long' %}
     {# the only row_errors we can get when sending one off messages is that the message is too long #}
-    {% include "partials/check/message-too-long.html" %}
+    <div class="bottom-gutter">
+      {% call banner_wrapper(type='dangerous') %}
+        {% include "partials/check/message-too-long.html" %}
+      {% endcall %}
+    </div>
   {% else %}
     <h1 class="heading-large">
       Preview of {{ template.name }}
diff --git a/tests/app/main/views/test_send.py b/tests/app/main/views/test_send.py
index 39d0e05a0..f025cae88 100644
--- a/tests/app/main/views/test_send.py
+++ b/tests/app/main/views/test_send.py
@@ -1937,6 +1937,35 @@ def test_send_notification_shows_error_if_400(
         _expected_status=200
     )
 
-    assert ' '.join(page.h1.text.split()) == expected_h1
-    assert ' '.join(page.h1.parent.p.text.split()) == expected_err_details
+    assert normalize_spaces(page.select('.banner-dangerous h1')[0].text) == expected_h1
+    assert normalize_spaces(page.select('.banner-dangerous p')[0].text) == expected_err_details
     assert not page.find('input[type=submit]')
+
+
+def test_send_notification_shows_email_error_in_trial_mode(
+    client_request,
+    fake_uuid,
+    mocker,
+    mock_get_service_email_template,
+):
+    mocker.patch(
+        'app.notification_api_client.send_notification',
+        side_effect=HTTPError(response=Mock(status_code=400), message=TRIAL_MODE_MSG)
+    )
+    with client_request.session_transaction() as session:
+        session['recipient'] = 'test@example.com'
+        session['placeholders'] = {'date': 'foo', 'thing': 'bar'}
+
+    page = client_request.post(
+        'main.send_notification',
+        service_id=SERVICE_ONE_ID,
+        template_id=fake_uuid,
+        _expected_status=200,
+    )
+
+    assert normalize_spaces(page.select('.banner-dangerous h1')[0].text) == (
+        'You can’t send to this email address'
+    )
+    assert normalize_spaces(page.select('.banner-dangerous p')[0].text) == (
+        'In trial mode you can only send to yourself and members of your team'
+    )