diff --git a/app/main/views/send.py b/app/main/views/send.py
index c6d720be1..1b42eca71 100644
--- a/app/main/views/send.py
+++ b/app/main/views/send.py
@@ -850,6 +850,7 @@ def _check_notification(service_id, template_id, exception=None):
         email_reply_to = get_email_reply_to_address_from_session()
     elif db_template['template_type'] == 'sms':
         sms_sender = get_sms_sender_from_session()
+    page_count = get_page_count_for_letter(db_template)
     template = get_template(
         db_template,
         current_service,
@@ -862,7 +863,7 @@ def _check_notification(service_id, template_id, exception=None):
             template_id=template_id,
             filetype='png',
         ),
-        page_count=get_page_count_for_letter(db_template),
+        page_count=page_count,
     )
 
     back_link = get_back_link(service_id, template, len(fields_to_fill_in(template)))
@@ -881,6 +882,7 @@ def _check_notification(service_id, template_id, exception=None):
         template=template,
         back_link=back_link,
         help=get_help_argument(),
+        page_count=page_count,
         **(get_template_error_dict(exception) if exception else {}),
     )
 
diff --git a/app/templates/views/notifications/check.html b/app/templates/views/notifications/check.html
index bdf55ecf4..b6ef62927 100644
--- a/app/templates/views/notifications/check.html
+++ b/app/templates/views/notifications/check.html
@@ -66,7 +66,7 @@
         help='3' if help else 0
       )}}" class='page-footer'>
       <input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
-      {% if not error %}
+      {% if not error and page_count < 11 %}
         <button type="submit" class="button">Send 1 {{ message_count_label(1, template.template_type, suffix='') }}</button>
       {% endif %}
       {% if template.template_type == 'letter' %}
diff --git a/tests/app/main/views/test_send.py b/tests/app/main/views/test_send.py
index c63c9fe29..1597495b3 100644
--- a/tests/app/main/views/test_send.py
+++ b/tests/app/main/views/test_send.py
@@ -3066,6 +3066,49 @@ def test_send_one_off_letter_errors_in_trial_mode(
     assert page.select_one('a[download]').text == 'Download as a PDF'
 
 
+def test_send_one_off_letter_errors_if_letter_longer_than_10_pages(
+    client_request,
+    mocker,
+    mock_get_live_service,
+    mock_get_service_letter_template,
+    mock_has_permissions,
+    fake_uuid,
+    mock_get_users_by_service,
+    mock_get_service_statistics,
+    mock_get_job_doesnt_exist,
+    mock_s3_set_metadata,
+):
+
+    mocker.patch(
+        'app.main.views.send.get_page_count_for_letter',
+        return_value=11,
+    )
+
+    with client_request.session_transaction() as session:
+        session['recipient'] = None
+        session['placeholders'] = {
+            'address_line_1': 'First Last',
+            'address_line_2': '123 Street',
+            'postcode': 'SW1 1AA',
+        }
+
+    page = client_request.get(
+        'main.check_notification',
+        service_id=SERVICE_ONE_ID,
+        template_id=fake_uuid,
+        _test_page_title=False,
+    )
+
+    assert normalize_spaces(page.select('.banner-dangerous')) == normalize_spaces(
+        'This letter is too long '
+        'Letters must be 10 pages or less'
+    )
+
+    assert len(page.select('.letter img')) == 10
+
+    assert not page.select('[type=submit]')
+
+
 def test_check_messages_shows_over_max_row_error(
     client_request,
     mock_get_users_by_service,