diff --git a/app/__init__.py b/app/__init__.py
index f73625cb3..0eb395c9b 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -12,7 +12,6 @@ from flask.ctx import has_app_context
 from flask_marshmallow import Marshmallow
 from flask_migrate import Migrate
 from flask_sqlalchemy import SQLAlchemy as _SQLAlchemy
-from notifications_utils import logging, request_helper
 from notifications_utils.clients.encryption.encryption_client import Encryption
 from notifications_utils.clients.redis.redis_client import RedisClient
 from notifications_utils.clients.zendesk.zendesk_client import ZendeskClient
@@ -26,6 +25,7 @@ from app.clients.document_download import DocumentDownloadClient
 from app.clients.email.aws_ses import AwsSesClient
 from app.clients.email.aws_ses_stub import AwsSesStubClient
 from app.clients.sms.aws_sns import AwsSnsClient
+from notifications_utils import logging, request_helper
 
 
 class NotifyCelery(Celery):
diff --git a/app/authentication/auth.py b/app/authentication/auth.py
index b3b4981a1..a85cd2b4f 100644
--- a/app/authentication/auth.py
+++ b/app/authentication/auth.py
@@ -12,10 +12,10 @@ from notifications_python_client.errors import (
     TokenExpiredError,
     TokenIssuerError,
 )
-from notifications_utils import request_helper
 from sqlalchemy.orm.exc import NoResultFound
 
 from app.serialised_models import SerialisedService
+from notifications_utils import request_helper
 
 # stvnrlly - this is silly, but bandit has a multiline string bug (https://github.com/PyCQA/bandit/issues/658)
 # and flake8 wants a multiline quote here. TODO: check on bug status and restore sanity once possible
diff --git a/app/config.py b/app/config.py
index 809a71ebe..8d913bdd8 100644
--- a/app/config.py
+++ b/app/config.py
@@ -2,10 +2,10 @@ import json
 from datetime import timedelta
 from os import getenv, path
 
-import notifications_utils
 from celery.schedules import crontab
 from kombu import Exchange, Queue
 
+import notifications_utils
 from app.cloudfoundry_config import cloud_config
 
 
diff --git a/app/notifications/rest.py b/app/notifications/rest.py
index 55d3c101a..9c5806ede 100644
--- a/app/notifications/rest.py
+++ b/app/notifications/rest.py
@@ -1,5 +1,4 @@
 from flask import Blueprint, current_app, jsonify, request
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
 
 from app import api_user, authenticated_service
 from app.aws.s3 import get_personalisation_from_s3, get_phone_number_from_s3
@@ -26,6 +25,7 @@ from app.schemas import (
 )
 from app.service.utils import service_allowed_to_send_to
 from app.utils import get_public_notify_type_text, pagination_links
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
 
 notifications = Blueprint("notifications", __name__)
 
diff --git a/app/notifications/validators.py b/app/notifications/validators.py
index 94fca2e02..247c0a78e 100644
--- a/app/notifications/validators.py
+++ b/app/notifications/validators.py
@@ -1,9 +1,4 @@
 from flask import current_app
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
-from notifications_utils.clients.redis import (
-    rate_limit_cache_key,
-    total_limit_cache_key,
-)
 from notifications_utils.recipients import (
     get_international_phone_info,
     validate_and_format_email_address,
@@ -22,6 +17,11 @@ from app.serialised_models import SerialisedTemplate
 from app.service.utils import service_allowed_to_send_to
 from app.utils import get_public_notify_type_text
 from app.v2.errors import BadRequestError, RateLimitError, TotalRequestsError
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
+from notifications_utils.clients.redis import (
+    rate_limit_cache_key,
+    total_limit_cache_key,
+)
 
 
 def check_service_over_api_rate_limit(service, api_key):
diff --git a/app/serialised_models.py b/app/serialised_models.py
index d9a227ccd..46c0f4a28 100644
--- a/app/serialised_models.py
+++ b/app/serialised_models.py
@@ -4,7 +4,6 @@ from threading import RLock
 
 import cachetools
 from flask import current_app
-from notifications_utils.clients.redis import RequestCache
 from notifications_utils.serialised_model import (
     SerialisedModel,
     SerialisedModelCollection,
@@ -14,6 +13,7 @@ from werkzeug.utils import cached_property
 from app import db, redis_store
 from app.dao.api_key_dao import get_model_api_keys
 from app.dao.services_dao import dao_fetch_service_by_id
+from notifications_utils.clients.redis import RequestCache
 
 caches = defaultdict(partial(cachetools.TTLCache, maxsize=1024, ttl=2))
 locks = defaultdict(RLock)
diff --git a/app/service_invite/rest.py b/app/service_invite/rest.py
index b61d131ee..629a01d47 100644
--- a/app/service_invite/rest.py
+++ b/app/service_invite/rest.py
@@ -55,7 +55,7 @@ def _create_service_invite(invited_user, invite_link_host):
     data = {}
     permissions = invited_user.permissions
     permissions = permissions.split(",")
-    data["from_user_id"] = (str(invited_user.from_user.id))
+    data["from_user_id"] = str(invited_user.from_user.id)
     data["service_id"] = str(invited_user.service.id)
     data["permissions"] = permissions
     data["folder_permissions"] = invited_user.folder_permissions
diff --git a/app/template/rest.py b/app/template/rest.py
index 750b93891..8c61a3d64 100644
--- a/app/template/rest.py
+++ b/app/template/rest.py
@@ -1,5 +1,4 @@
 from flask import Blueprint, jsonify, request
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
 from notifications_utils.template import SMSMessageTemplate
 from sqlalchemy.orm.exc import NoResultFound
 
@@ -28,6 +27,7 @@ from app.template.template_schemas import (
     post_update_template_schema,
 )
 from app.utils import get_public_notify_type_text
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
 
 template_blueprint = Blueprint(
     "template", __name__, url_prefix="/service/<uuid:service_id>/template"
diff --git a/tests/app/notifications/test_validators.py b/tests/app/notifications/test_validators.py
index 42d96c93d..c6c317744 100644
--- a/tests/app/notifications/test_validators.py
+++ b/tests/app/notifications/test_validators.py
@@ -1,7 +1,6 @@
 import pytest
 from flask import current_app
 from freezegun import freeze_time
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
 
 import app
 from app.dao import templates_dao
@@ -37,6 +36,7 @@ from app.serialised_models import (
 from app.service.utils import service_allowed_to_send_to
 from app.utils import get_template_instance
 from app.v2.errors import BadRequestError, RateLimitError, TotalRequestsError
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
 from tests.app.db import (
     create_api_key,
     create_reply_to_email,
diff --git a/tests/app/service/send_notification/test_send_notification.py b/tests/app/service/send_notification/test_send_notification.py
index b1bd27988..1997c2bf3 100644
--- a/tests/app/service/send_notification/test_send_notification.py
+++ b/tests/app/service/send_notification/test_send_notification.py
@@ -5,7 +5,6 @@ import pytest
 from flask import current_app, json
 from freezegun import freeze_time
 from notifications_python_client.authentication import create_jwt_token
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
 
 import app
 from app.dao import notifications_dao
@@ -17,6 +16,7 @@ from app.errors import InvalidRequest
 from app.models import ApiKey, Notification, NotificationHistory, Template
 from app.service.send_notification import send_one_off_notification
 from app.v2.errors import RateLimitError
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
 from tests import create_service_authorization_header
 from tests.app.db import (
     create_api_key,
diff --git a/tests/app/service/send_notification/test_send_one_off_notification.py b/tests/app/service/send_notification/test_send_one_off_notification.py
index 000e22005..a44806cb6 100644
--- a/tests/app/service/send_notification/test_send_one_off_notification.py
+++ b/tests/app/service/send_notification/test_send_one_off_notification.py
@@ -2,7 +2,6 @@ import uuid
 from unittest.mock import Mock
 
 import pytest
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
 from notifications_utils.recipients import InvalidPhoneError
 
 from app.config import QueueNames
@@ -18,6 +17,7 @@ from app.enums import (
 from app.models import Notification, ServiceGuestList
 from app.service.send_notification import send_one_off_notification
 from app.v2.errors import BadRequestError
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
 from tests.app.db import (
     create_reply_to_email,
     create_service,
diff --git a/tests/app/template/test_rest.py b/tests/app/template/test_rest.py
index 93b36939f..45dfc24f9 100644
--- a/tests/app/template/test_rest.py
+++ b/tests/app/template/test_rest.py
@@ -6,11 +6,11 @@ from datetime import datetime, timedelta
 
 import pytest
 from freezegun import freeze_time
-from notifications_utils import SMS_CHAR_COUNT_LIMIT
 
 from app.dao.templates_dao import dao_get_template_by_id, dao_redact_template
 from app.enums import ServicePermissionType, TemplateProcessType, TemplateType
 from app.models import Template, TemplateHistory
+from notifications_utils import SMS_CHAR_COUNT_LIMIT
 from tests import create_admin_authorization_header
 from tests.app.db import create_service, create_template, create_template_folder