diff --git a/app/main/views/notifications.py b/app/main/views/notifications.py
index 07bbb9b35..2a533bc30 100644
--- a/app/main/views/notifications.py
+++ b/app/main/views/notifications.py
@@ -134,6 +134,14 @@ def view_notification(service_id, notification_id):
             status='sending,delivered,failed',
         )
 
+    if notification['notification_type'] == 'letter':
+        estimated_letter_delivery_date = get_letter_timings(
+            notification['created_at'],
+            postage=notification['postage']
+        ).earliest_delivery
+    else:
+        estimated_letter_delivery_date = None
+
     return render_template(
         'views/notifications/notification.html',
         finished=(notification['status'] in (DELIVERED_STATUSES + FAILURE_STATUSES)),
@@ -154,10 +162,7 @@ def view_notification(service_id, notification_id):
         created_at=notification['created_at'],
         updated_at=notification['updated_at'],
         help=get_help_argument(),
-        estimated_letter_delivery_date=get_letter_timings(
-            notification['created_at'],
-            postage=notification['postage']
-        ).earliest_delivery,
+        estimated_letter_delivery_date=estimated_letter_delivery_date,
         notification_id=notification['id'],
         postage=notification['postage'],
         can_receive_inbound=(current_service.has_permission('inbound_sms')),
diff --git a/requirements-app.txt b/requirements-app.txt
index 80a3f30f7..e70659ff1 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -23,5 +23,5 @@ notifications-python-client==5.5.1
 awscli-cwlogs>=1.4,<1.5
 itsdangerous==1.1.0
 
-git+https://github.com/alphagov/notifications-utils.git@39.3.0#egg=notifications-utils==39.3.0
+git+https://github.com/alphagov/notifications-utils.git@39.4.2#egg=notifications-utils==39.4.2
 git+https://github.com/alphagov/govuk-frontend-jinja.git@v0.5.1-alpha#egg=govuk-frontend-jinja==0.5.1-alpha
diff --git a/requirements.txt b/requirements.txt
index f5d52fee8..196fce3b7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,14 +25,14 @@ notifications-python-client==5.5.1
 awscli-cwlogs>=1.4,<1.5
 itsdangerous==1.1.0
 
-git+https://github.com/alphagov/notifications-utils.git@39.3.0#egg=notifications-utils==39.3.0
+git+https://github.com/alphagov/notifications-utils.git@39.4.2#egg=notifications-utils==39.4.2
 git+https://github.com/alphagov/govuk-frontend-jinja.git@v0.5.1-alpha#egg=govuk-frontend-jinja==0.5.1-alpha
 
 ## The following requirements were added by pip freeze:
-awscli==1.18.63
+awscli==1.18.67
 bleach==3.1.4
 boto3==1.10.38
-botocore==1.16.13
+botocore==1.16.17
 certifi==2020.4.5.1
 chardet==3.0.4
 click==7.1.2
@@ -67,7 +67,7 @@ redis==3.5.2
 requests==2.23.0
 rsa==3.4.2
 s3transfer==0.3.3
-six==1.14.0
+six==1.15.0
 smartypants==2.0.1
 statsd==3.3.0
 texttable==1.6.2
diff --git a/tests/app/main/views/test_jobs.py b/tests/app/main/views/test_jobs.py
index 8a81153b4..996d77dcc 100644
--- a/tests/app/main/views/test_jobs.py
+++ b/tests/app/main/views/test_jobs.py
@@ -349,13 +349,17 @@ def test_should_show_letter_job(
 
 @freeze_time("2016-01-01 11:09:00")
 def test_should_show_letter_job_with_banner_after_sending_before_1730(
+    mocker,
     client_request,
     mock_get_service_letter_template,
     mock_get_letter_job,
-    mock_get_notifications,
     mock_get_service_data_retention,
     fake_uuid,
 ):
+    mocker.patch(
+        'app.notification_api_client.get_notifications_for_service',
+        return_value=create_notifications(template_type='letter', postage='second')
+    )
 
     page = client_request.get(
         'main.view_job',
@@ -373,13 +377,17 @@ def test_should_show_letter_job_with_banner_after_sending_before_1730(
 
 @freeze_time("2016-01-01 11:09:00")
 def test_should_show_letter_job_with_banner_when_there_are_multiple_CSV_rows(
+    mocker,
     client_request,
     mock_get_service_letter_template,
     mock_get_letter_job_in_progress,
-    mock_get_notifications,
     mock_get_service_data_retention,
     fake_uuid,
 ):
+    mocker.patch(
+        'app.notification_api_client.get_notifications_for_service',
+        return_value=create_notifications(template_type='letter', postage='second')
+    )
 
     page = client_request.get(
         'main.view_job',
@@ -396,13 +404,17 @@ def test_should_show_letter_job_with_banner_when_there_are_multiple_CSV_rows(
 
 @freeze_time("2016-01-01 18:09:00")
 def test_should_show_letter_job_with_banner_after_sending_after_1730(
+    mocker,
     client_request,
     mock_get_service_letter_template,
     mock_get_letter_job,
-    mock_get_notifications,
     mock_get_service_data_retention,
     fake_uuid,
 ):
+    mocker.patch(
+        'app.notification_api_client.get_notifications_for_service',
+        return_value=create_notifications(template_type='letter', postage='second')
+    )
 
     page = client_request.get(
         'main.view_job',
diff --git a/tests/app/main/views/test_notifications.py b/tests/app/main/views/test_notifications.py
index f4b70e642..625048c9c 100644
--- a/tests/app/main/views/test_notifications.py
+++ b/tests/app/main/views/test_notifications.py
@@ -530,13 +530,13 @@ def test_notification_page_does_not_show_cancel_link_for_letter_which_cannot_be_
         'europe',
         'Postage: international',
         'letter-postage-international',
-        'Estimated delivery date: Wednesday 6 January',
+        'Estimated delivery date: Friday 8 January',
     ),
     (
         'rest-of-world',
         'Postage: international',
         'letter-postage-international',
-        'Estimated delivery date: Wednesday 6 January',
+        'Estimated delivery date: Monday 11 January',
     ),
 ))
 @freeze_time("2016-01-01 18:00")