diff --git a/app/v2/broadcast/post_broadcast.py b/app/v2/broadcast/post_broadcast.py
index c52f68e65..38864c386 100644
--- a/app/v2/broadcast/post_broadcast.py
+++ b/app/v2/broadcast/post_broadcast.py
@@ -44,7 +44,10 @@ def create_broadcast():
     _validate_template(broadcast_json)
 
     polygons = Polygons(list(chain.from_iterable((
-        area['polygons'] for area in broadcast_json['areas']
+        [
+            [[y, x] for x, y in polygon]
+            for polygon in area['polygons']
+        ] for area in broadcast_json['areas']
     ))))
 
     broadcast_message = BroadcastMessage(
@@ -56,7 +59,7 @@ def create_broadcast():
             'names': [
                 area['name'] for area in broadcast_json['areas']
             ],
-            'simple_polygons': polygons.smooth.simplify.as_coordinate_pairs_long_lat,
+            'simple_polygons': polygons.smooth.simplify.as_coordinate_pairs_lat_long,
         },
         status=BroadcastStatusType.PENDING_APPROVAL,
         api_key_id=api_user.id,
diff --git a/requirements.in b/requirements.in
index 88c942024..eb199b031 100644
--- a/requirements.in
+++ b/requirements.in
@@ -36,7 +36,7 @@ notifications-python-client==6.0.2
 # PaaS
 awscli-cwlogs==1.4.6
 
-git+https://github.com/alphagov/notifications-utils.git@48.1.0#egg=notifications-utils==48.1.0
+git+https://github.com/alphagov/notifications-utils.git@48.0.0#egg=notifications-utils==49.0.0
 
 # gds-metrics requires prometheseus 0.2.0, override that requirement as 0.7.1 brings significant performance gains
 prometheus-client==0.10.1
diff --git a/tests/app/v2/broadcast/test_post_broadcast.py b/tests/app/v2/broadcast/test_post_broadcast.py
index 7b43897c2..c65619923 100644
--- a/tests/app/v2/broadcast/test_post_broadcast.py
+++ b/tests/app/v2/broadcast/test_post_broadcast.py
@@ -105,7 +105,7 @@ def test_valid_post_cap_xml_broadcast_returns_201(
     assert response_json['service_id'] == str(sample_broadcast_service.id)
 
     assert len(response_json['areas']['simple_polygons']) == 1
-    assert len(response_json['areas']['simple_polygons'][0]) == 22
+    assert len(response_json['areas']['simple_polygons'][0]) == 27
     assert response_json['areas']['simple_polygons'][0][0] == [53.10562, 0.244127]
     assert response_json['areas']['simple_polygons'][0][-1] == [53.10562, 0.244127]
     assert response_json['areas']['names'] == ['River Steeping in Wainfleet All Saints']