diff --git a/config/envs/default.py b/config/envs/default.py
index e55f444b..23c9fc28 100644
--- a/config/envs/default.py
+++ b/config/envs/default.py
@@ -13,11 +13,7 @@
 class DefaultConfig:
     #  Application Config
     FLASK_ENV = environ.get("FLASK_ENV", None)
-    SECRET_KEY = environ.get("SECRET_KEY", None)
-    if not SECRET_KEY:
-        if FLASK_ENV in ["dev", "test", "uat", "production"]:
-            raise KeyError("SECRET_KEY is not present in environment")
-        SECRET_KEY = "dev-secret"  # pragma: allowlist secret
+    SECRET_KEY = CommonConfig.SECRET_KEY
     SESSION_COOKIE_NAME = environ.get("SESSION_COOKIE_NAME", "session_cookie")
     FLASK_ROOT = str(Path(__file__).parent.parent.parent)
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 13c5da27..dea09af7 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -60,7 +60,7 @@ blinker==1.8.2
 boto3==1.34.152
     # via
     #   -r requirements.txt
-    #   funding-service-design-utils
+    #   flipper-client
     #   moto
 botocore==1.34.152
     # via
@@ -70,6 +70,10 @@ botocore==1.34.152
     #   s3transfer
 build==1.2.1
     # via pip-tools
+cachetools==5.5.0
+    # via
+    #   -r requirements.txt
+    #   flipper-client
 certifi==2024.7.4
     # via
     #   -r requirements.txt
@@ -171,7 +175,11 @@ flask-sqlalchemy==3.1.1
     #   -r requirements.txt
     #   flask-migrate
     #   funding-service-design-utils
-git+https://github.com/communitiesuk/funding-service-design-utils.git@fs-4647-a
+flipper-client==1.3.2
+    # via
+    #   -r requirements.txt
+    #   funding-service-design-utils
+funding-service-design-utils==4.0.0
     # via -r requirements.txt
 gunicorn==22.0.0
     # via
@@ -343,6 +351,10 @@ pycparser==2.22
     # via
     #   -r requirements.txt
     #   cffi
+pyee==6.0.0
+    # via
+    #   -r requirements.txt
+    #   flipper-client
 pyflakes==3.2.0
     # via flake8
 pygments==2.18.0
@@ -369,6 +381,10 @@ pytest-flask==1.3.0
     # via -r requirements-dev.in
 pytest-mock==3.14.0
     # via -r requirements-dev.in
+python-consul==1.1.0
+    # via
+    #   -r requirements.txt
+    #   flipper-client
 python-dateutil==2.9.0.post0
     # via
     #   -r requirements.txt
@@ -376,7 +392,7 @@ python-dateutil==2.9.0.post0
     #   flask-apscheduler
     #   moto
     #   pandas
-python-dotenv==1.0.1
+python-dotenv==0.20.0
     # via
     #   -r requirements.txt
     #   funding-service-design-utils
@@ -411,6 +427,7 @@ redis==4.6.0
     # via
     #   -r requirements.txt
     #   flask-redis
+    #   flipper-client
 referencing==0.35.1
     # via
     #   -r requirements.txt
@@ -425,6 +442,7 @@ requests==2.32.3
     #   jsonschema-path
     #   moto
     #   prance
+    #   python-consul
     #   responses
 responses==0.25.3
     # via moto
@@ -463,8 +481,10 @@ six==1.16.0
     #   apscheduler
     #   jsonpath-rw
     #   prance
+    #   python-consul
     #   python-dateutil
     #   rfc3339-validator
+    #   thrift
 slugify==0.0.1
     # via -r requirements.txt
 sniffio==1.3.1
@@ -498,6 +518,10 @@ swagger-ui-bundle==1.1.0
     # via
     #   -r requirements.txt
     #   connexion
+thrift==0.20.0
+    # via
+    #   -r requirements.txt
+    #   flipper-client
 tomli==2.0.1
     # via
     #   black
diff --git a/requirements.in b/requirements.in
index 4b84df75..88438e56 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,7 +1,7 @@
 #-----------------------------------
 #   FSD Utils
 #-----------------------------------
-funding-service-design-utils>=5.0.7,<=6.0.0
+funding-service-design-utils>=2.0.51,<=4.0.0
 
 requests==2.32.3
 slugify
diff --git a/requirements.txt b/requirements.txt
index a23a9a1c..840ff036 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,11 +38,13 @@ blinker==1.8.2
     #   flask
     #   sentry-sdk
 boto3==1.34.152
-    # via funding-service-design-utils
+    # via flipper-client
 botocore==1.34.152
     # via
     #   boto3
     #   s3transfer
+cachetools==5.5.0
+    # via flipper-client
 certifi==2024.7.4
     # via
     #   httpcore
@@ -102,7 +104,9 @@ flask-sqlalchemy==3.1.1
     #   -r requirements.in
     #   flask-migrate
     #   funding-service-design-utils
-git+https://github.com/communitiesuk/funding-service-design-utils.git@fs-4647-a
+flipper-client==1.3.2
+    # via funding-service-design-utils
+funding-service-design-utils==4.0.0
     # via -r requirements.in
 gunicorn==22.0.0
     # via funding-service-design-utils
@@ -196,19 +200,23 @@ psycopg2-binary==2.9.9
     # via -r requirements.in
 pycparser==2.22
     # via cffi
+pyee==6.0.0
+    # via flipper-client
 pygments==2.18.0
     # via rich
 pyjwt[crypto]==2.9.0
     # via
     #   funding-service-design-utils
     #   pyjwt
+python-consul==1.1.0
+    # via flipper-client
 python-dateutil==2.9.0.post0
     # via
     #   -r requirements.in
     #   botocore
     #   flask-apscheduler
     #   pandas
-python-dotenv==1.0.1
+python-dotenv==0.20.0
     # via
     #   funding-service-design-utils
     #   uvicorn
@@ -230,7 +238,9 @@ pyyaml==6.0.1
     #   jsonschema-path
     #   uvicorn
 redis==4.6.0
-    # via flask-redis
+    # via
+    #   flask-redis
+    #   flipper-client
 referencing==0.35.1
     # via
     #   jsonschema
@@ -243,6 +253,7 @@ requests==2.32.3
     #   funding-service-design-utils
     #   jsonschema-path
     #   prance
+    #   python-consul
 rfc3339-validator==0.1.4
     # via openapi-schema-validator
 rich==12.6.0
@@ -258,16 +269,16 @@ ruamel-yaml-clib==0.2.8
 s3transfer==0.10.2
     # via boto3
 sentry-sdk[flask]==2.12.0
-    # via
-    #   funding-service-design-utils
-    #   sentry-sdk
+    # via funding-service-design-utils
 six==1.16.0
     # via
     #   apscheduler
     #   jsonpath-rw
     #   prance
+    #   python-consul
     #   python-dateutil
     #   rfc3339-validator
+    #   thrift
 slugify==0.0.1
     # via -r requirements.in
 sniffio==1.3.1
@@ -296,6 +307,8 @@ swagger-ui-bundle==1.1.0
     # via
     #   -r requirements.in
     #   connexion
+thrift==0.20.0
+    # via flipper-client
 typing-extensions==4.12.2
     # via
     #   a2wsgi