diff --git a/pyproject.toml b/pyproject.toml
index 90ed17fba..b875787b8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -115,7 +115,8 @@ markers = [
 omit = ["*/migrations/*", "*/test/*", "e2e_tests/*"]
 
 [tool.ruff]
-extend-select = ["B", "S"]
+src = ["src"]
+extend-select = ["B", "S", "I"]
 ignore = ["B904", "E501", "N818", "S101"]
 extend-exclude = [
     "manage.py",
diff --git a/src/config/celery.py b/src/config/celery.py
index ec4a0cb1b..2557b4714 100644
--- a/src/config/celery.py
+++ b/src/config/celery.py
@@ -3,6 +3,7 @@
 from celery import Celery
 from celery.schedules import crontab
 
+
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.prod")
 
 celery_app = Celery("DjangoCelery")
diff --git a/src/config/settings/test.py b/src/config/settings/test.py
index ea71000c4..8c8006d60 100644
--- a/src/config/settings/test.py
+++ b/src/config/settings/test.py
@@ -2,6 +2,7 @@
 
 from .base import *  # noqa
 
+
 APP_ENV = "test"
 DEBUG = True
 TEMPLATE_DEBUG = True
diff --git a/src/config/urls.py b/src/config/urls.py
index 62d65d33f..4aec88eda 100644
--- a/src/config/urls.py
+++ b/src/config/urls.py
@@ -13,6 +13,7 @@
 from core.urls import urlpatterns as core_urlpatterns
 from peoplefinder.urls import api_urlpatterns, people_urlpatterns, teams_urlpatterns
 
+
 urlpatterns = [
     # URLs for Staff SSO Auth broker
     path("auth/", include(authbroker_client_urls)),
diff --git a/src/config/wsgi.py b/src/config/wsgi.py
index e06aed09d..2ad0bbf00 100644
--- a/src/config/wsgi.py
+++ b/src/config/wsgi.py
@@ -12,6 +12,7 @@
 from django.core.wsgi import get_wsgi_application
 from opentelemetry.instrumentation.wsgi import OpenTelemetryMiddleware
 
+
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.prod")
 
 application = get_wsgi_application()
diff --git a/src/content/management/commands/create_groups.py b/src/content/management/commands/create_groups.py
index a503ba121..8cb916317 100644
--- a/src/content/management/commands/create_groups.py
+++ b/src/content/management/commands/create_groups.py
@@ -14,6 +14,7 @@
     WorkingAtDITHome,
 )
 
+
 TOP_LEVEL_PAGE_TYPES = [
     AboutUsHome,
     HowDoIHome,
diff --git a/src/content/models.py b/src/content/models.py
index f19977a4b..0b9d84702 100644
--- a/src/content/models.py
+++ b/src/content/models.py
@@ -24,12 +24,13 @@
 from content import blocks
 from content.utils import manage_excluded, manage_pinned, truncate_words_and_chars
 from core.utils import set_seen_cookie_banner
-from extended_search.index import Indexed
 from extended_search.index import DWIndexedField as IndexedField
+from extended_search.index import Indexed
 from peoplefinder.widgets import PersonChooser
 from search.utils import split_query
 from user.models import User as UserModel
 
+
 User = get_user_model()
 
 RICH_TEXT_FEATURES = [
diff --git a/src/core/models.py b/src/core/models.py
index 320cecb6d..36f6be522 100644
--- a/src/core/models.py
+++ b/src/core/models.py
@@ -2,9 +2,9 @@
 from django.db import models
 from simple_history import register
 from simple_history.models import HistoricalRecords
+from waffle.models import AbstractUserFlag
 from wagtail.documents.models import Document
 from wagtail.snippets.models import register_snippet
-from waffle.models import AbstractUserFlag
 
 
 @register_snippet
diff --git a/src/core/urls.py b/src/core/urls.py
index 41f13a663..72a4575e5 100644
--- a/src/core/urls.py
+++ b/src/core/urls.py
@@ -6,4 +6,5 @@
 urlpatterns = [
     path("problem-found/", views.page_problem_found, name="page_problem_found"),
     path("deactivated/", views.deactivated, name="deactivated"),
+    path("report/user-groups", views.user_groups_report, name="report:user-groups"),
 ]
diff --git a/src/core/views.py b/src/core/views.py
index cc5c22f2b..7484744b8 100644
--- a/src/core/views.py
+++ b/src/core/views.py
@@ -1,11 +1,17 @@
+import csv
 import logging
 
 from django.conf import settings
+from django.contrib.postgres.aggregates import StringAgg
+from django.core.exceptions import PermissionDenied
+from django.http import HttpRequest, HttpResponse
 from django.template.response import TemplateResponse
+from django.views.decorators.http import require_GET
 from notifications_python_client.notifications import NotificationsAPIClient
 from sentry_sdk import capture_message
 
 from core.forms import PageProblemFoundForm
+from user.models import User
 
 
 logger = logging.getLogger(__name__)
@@ -86,3 +92,31 @@ def page_problem_found(request):
         "core/page_problem_found.html",
         {"form": form, "message_sent": message_sent},
     )
+
+
+@require_GET
+def user_groups_report(request: HttpRequest, *args, **kwargs) -> HttpResponse:
+    if not request.user.is_superuser:
+        raise PermissionDenied
+
+    header = ["ID", "Email", "First name", "Last name", "Groups"]
+
+    qs = (
+        User.objects.filter(groups__isnull=False)
+        .annotate(group_names=StringAgg("groups__name", delimiter=", "))
+        .values_list("id", "email", "first_name", "last_name", "group_names")
+    )
+
+    filename = "user_groups.csv"
+
+    response = HttpResponse(
+        content_type="text/csv",
+        headers={"Content-Disposition": f'attachment; filename="{filename}"'},
+    )
+
+    writer = csv.writer(response)
+    writer.writerow(header)
+    for obj in qs:
+        writer.writerow(obj)
+
+    return response
diff --git a/src/e2e_tests/conftest.py b/src/e2e_tests/conftest.py
index dfefff6ce..bb390013f 100644
--- a/src/e2e_tests/conftest.py
+++ b/src/e2e_tests/conftest.py
@@ -31,6 +31,7 @@
     recreate_db,
 )
 
+
 os.environ["DJANGO_ALLOW_ASYNC_UNSAFE"] = "true"
 
 
diff --git a/src/extended_search/admin.py b/src/extended_search/admin.py
index d9f0fea19..3235a0c98 100644
--- a/src/extended_search/admin.py
+++ b/src/extended_search/admin.py
@@ -2,8 +2,8 @@
 from django.contrib import admin
 
 from core.admin import admin_site
-from extended_search.models import Setting
 from extended_search import settings
+from extended_search.models import Setting
 
 
 class SettingAdminForm(forms.ModelForm):
diff --git a/src/extended_search/backends/backend.py b/src/extended_search/backends/backend.py
index 6464f9e16..57832deb5 100644
--- a/src/extended_search/backends/backend.py
+++ b/src/extended_search/backends/backend.py
@@ -9,8 +9,8 @@
 from wagtail.search.index import SearchField
 from wagtail.search.query import MATCH_NONE, Fuzzy, MatchAll, Not, Phrase, PlainText
 
-from extended_search.query import Filtered, Nested, OnlyFields
 from extended_search.index import RelatedFields
+from extended_search.query import Filtered, Nested, OnlyFields
 
 
 class FilteredSearchMapping(Elasticsearch7Mapping):
diff --git a/src/extended_search/index.py b/src/extended_search/index.py
index b45221408..19dbc3551 100644
--- a/src/extended_search/index.py
+++ b/src/extended_search/index.py
@@ -13,6 +13,7 @@
 
 from extended_search.types import AnalysisType
 
+
 logger = logging.getLogger(__name__)
 
 
diff --git a/src/extended_search/query_builder.py b/src/extended_search/query_builder.py
index 2b592194d..1b15454c6 100644
--- a/src/extended_search/query_builder.py
+++ b/src/extended_search/query_builder.py
@@ -21,6 +21,7 @@
 from extended_search.query import Filtered, Nested, OnlyFields
 from extended_search.types import AnalysisType, SearchQueryType
 
+
 logger = logging.getLogger(__name__)
 
 
diff --git a/src/extended_search/settings.py b/src/extended_search/settings.py
index e35757c64..d0944b99e 100644
--- a/src/extended_search/settings.py
+++ b/src/extended_search/settings.py
@@ -17,6 +17,7 @@
     get_indexed_models,
 )
 
+
 env_file_path = os.path.join(
     os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))),
     ".env",
diff --git a/src/extended_search/signals.py b/src/extended_search/signals.py
index b49a33571..10419277e 100644
--- a/src/extended_search/signals.py
+++ b/src/extended_search/signals.py
@@ -1,7 +1,7 @@
-from django.db.models.signals import post_save, post_delete
+from django.db.models.signals import post_delete, post_save
 
-from extended_search.models import Setting
 from extended_search import settings
+from extended_search.models import Setting
 
 
 def update_searchsetting_queryset(sender, **kwargs):
diff --git a/src/extended_search/tests/test_backend.py b/src/extended_search/tests/test_backend.py
index 6905965c6..ed0a5ff85 100644
--- a/src/extended_search/tests/test_backend.py
+++ b/src/extended_search/tests/test_backend.py
@@ -8,10 +8,10 @@
 from wagtail.search.query import (
     MATCH_NONE,
     Fuzzy,
-    Phrase,
-    PlainText,
     MatchAll,
     Not,
+    Phrase,
+    PlainText,
     SearchQuery,
 )
 
diff --git a/src/extended_search/tests/test_query.py b/src/extended_search/tests/test_query.py
index 4df00285c..95239bf51 100644
--- a/src/extended_search/tests/test_query.py
+++ b/src/extended_search/tests/test_query.py
@@ -1,7 +1,7 @@
 import pytest
+from wagtail.search.query import PlainText
 
 from extended_search.query import Filtered, Nested, OnlyFields
-from wagtail.search.query import PlainText
 
 
 class TestOnlyFields:
diff --git a/src/extended_search/tests/test_types.py b/src/extended_search/tests/test_types.py
index e6af96a31..c4a57c474 100644
--- a/src/extended_search/tests/test_types.py
+++ b/src/extended_search/tests/test_types.py
@@ -1,7 +1,8 @@
-import pytest
 from enum import Enum
 
-from extended_search.types import SearchQueryType, AnalysisType
+import pytest
+
+from extended_search.types import AnalysisType, SearchQueryType
 
 
 class TestAnalysisType:
diff --git a/src/home/util.py b/src/home/util.py
index b4a6f598f..098c53664 100644
--- a/src/home/util.py
+++ b/src/home/util.py
@@ -1,7 +1,7 @@
 import tweepy
 from django.conf import settings
-from tweepy.auth import OAuthHandler
 from sentry_sdk import capture_exception
+from tweepy.auth import OAuthHandler
 
 
 def get_tweets():
diff --git a/src/news/models.py b/src/news/models.py
index 55b259aea..5de1eebc9 100644
--- a/src/news/models.py
+++ b/src/news/models.py
@@ -17,6 +17,7 @@
 from news.forms import CommentForm
 from working_at_dit.models import PageWithTopics
 
+
 UserModel = get_user_model()
 
 
diff --git a/src/patch/__init__.py b/src/patch/__init__.py
index cf58023a9..806893c90 100644
--- a/src/patch/__init__.py
+++ b/src/patch/__init__.py
@@ -1,6 +1,8 @@
-from extended_search.index import get_indexed_models, class_is_indexed
 from wagtail.search import index
 
+from extended_search.index import class_is_indexed, get_indexed_models
+
+
 index.get_indexed_models = get_indexed_models
 index.class_is_indexed = class_is_indexed
 
diff --git a/src/peoplefinder/forms/profile.py b/src/peoplefinder/forms/profile.py
index 21b2f19d1..a4e442f6b 100644
--- a/src/peoplefinder/forms/profile.py
+++ b/src/peoplefinder/forms/profile.py
@@ -4,6 +4,7 @@
 from django.contrib.auth import get_user_model
 from django.core.validators import ValidationError
 
+
 User = get_user_model()
 
 
diff --git a/src/peoplefinder/legacy_migration/migrate_legacy.py b/src/peoplefinder/legacy_migration/migrate_legacy.py
index 497597a38..57a2a1db1 100644
--- a/src/peoplefinder/legacy_migration/migrate_legacy.py
+++ b/src/peoplefinder/legacy_migration/migrate_legacy.py
@@ -56,6 +56,7 @@
 from peoplefinder.services.team import TeamService
 from user.models import User
 
+
 BATCH_SIZE = 100
 
 logger = logging.getLogger(__name__)
diff --git a/src/peoplefinder/management/commands/create_test_teams.py b/src/peoplefinder/management/commands/create_test_teams.py
index 793115dc0..333e49d45 100644
--- a/src/peoplefinder/management/commands/create_test_teams.py
+++ b/src/peoplefinder/management/commands/create_test_teams.py
@@ -3,6 +3,7 @@
 from peoplefinder.models import Team
 from peoplefinder.services.team import TeamService
 
+
 TREE_HELP = """Team tree:
 .
 └── SpaceX
diff --git a/src/peoplefinder/models.py b/src/peoplefinder/models.py
index 27cb8e7ec..74ceaf81e 100644
--- a/src/peoplefinder/models.py
+++ b/src/peoplefinder/models.py
@@ -22,6 +22,7 @@
 from extended_search.index import DWIndexedField as IndexedField
 from extended_search.index import Indexed, RelatedFields
 
+
 # United Kingdom
 DEFAULT_COUNTRY_PK = "CTHMTC00260"
 
diff --git a/src/peoplefinder/services/person.py b/src/peoplefinder/services/person.py
index c98a4b298..1ddf511bb 100644
--- a/src/peoplefinder/services/person.py
+++ b/src/peoplefinder/services/person.py
@@ -30,6 +30,7 @@
 from peoplefinder.types import EditSections, ProfileSections
 from user.models import User
 
+
 logger = logging.getLogger(__name__)
 
 LEFT_DIT_LOG_MESSAGE = """People Finder deletion request: {profile_name}
diff --git a/src/peoplefinder/templatetags/markdown.py b/src/peoplefinder/templatetags/markdown.py
index 1a3fe2751..a7d9fe129 100644
--- a/src/peoplefinder/templatetags/markdown.py
+++ b/src/peoplefinder/templatetags/markdown.py
@@ -3,6 +3,7 @@
 from django.utils.html import conditional_escape
 from django.utils.safestring import mark_safe
 
+
 register = template.Library()
 
 
diff --git a/src/peoplefinder/templatetags/profile.py b/src/peoplefinder/templatetags/profile.py
index 6ed0d7738..fec9bd38a 100644
--- a/src/peoplefinder/templatetags/profile.py
+++ b/src/peoplefinder/templatetags/profile.py
@@ -6,6 +6,7 @@
 
 from peoplefinder.models import Person
 
+
 register = template.Library()
 
 
diff --git a/src/peoplefinder/urls.py b/src/peoplefinder/urls.py
index dc488aca1..263ef8ad1 100644
--- a/src/peoplefinder/urls.py
+++ b/src/peoplefinder/urls.py
@@ -38,6 +38,7 @@
     TeamTreeView,
 )
 
+
 people_urlpatterns = [
     path("", PeopleHome.as_view(), name="people-home"),
     path(
diff --git a/src/peoplefinder/views/profile.py b/src/peoplefinder/views/profile.py
index 27c583d6c..9001ce3e0 100644
--- a/src/peoplefinder/views/profile.py
+++ b/src/peoplefinder/views/profile.py
@@ -48,6 +48,7 @@
 
 from .base import HtmxFormView, PeoplefinderView
 
+
 User = get_user_model()
 
 
diff --git a/src/peoplefinder/views/team.py b/src/peoplefinder/views/team.py
index 2d78f65cf..424de5c62 100644
--- a/src/peoplefinder/views/team.py
+++ b/src/peoplefinder/views/team.py
@@ -15,6 +15,7 @@
 
 from .base import PeoplefinderView
 
+
 # TODO: Potential to refactor for the common parts.
 
 
diff --git a/src/search/templatetags/search.py b/src/search/templatetags/search.py
index 0fe9f8b4f..66f725cab 100644
--- a/src/search/templatetags/search.py
+++ b/src/search/templatetags/search.py
@@ -6,6 +6,7 @@
 
 from search import search as search_vectors
 
+
 # from search.utils import has_only_bad_results
 # from silk.profiling.profiler import silk_profile
 
diff --git a/src/search/templatetags/search_explore.py b/src/search/templatetags/search_explore.py
index d9044e235..625d64841 100644
--- a/src/search/templatetags/search_explore.py
+++ b/src/search/templatetags/search_explore.py
@@ -6,6 +6,7 @@
 from search import search as search_vectors
 from search.templatetags import search as main_search
 
+
 register = template.Library()
 
 
diff --git a/src/search/urls.py b/src/search/urls.py
index ba3f887a9..0801547d4 100644
--- a/src/search/urls.py
+++ b/src/search/urls.py
@@ -1,7 +1,7 @@
 from django.urls import path
 from django.views.generic import RedirectView
 
-from .views import explore, search, autocomplete
+from .views import autocomplete, explore, search
 
 
 app_name = "search"
diff --git a/src/search/utils.py b/src/search/utils.py
index cee4d75d1..c0053f7fb 100644
--- a/src/search/utils.py
+++ b/src/search/utils.py
@@ -5,10 +5,10 @@
 from django.conf import settings
 from wagtail.search.query import Fuzzy, Or, Phrase, PlainText
 
+from extended_search import settings as search_settings
 from extended_search.index import Indexed
 from extended_search.query import OnlyFields
 from extended_search.query_builder import CustomQueryBuilder
-from extended_search import settings as search_settings
 
 
 def sanitize_search_query(query: Optional[str] = None) -> str:
diff --git a/src/search/views.py b/src/search/views.py
index eb8ff4835..1017fe7fd 100644
--- a/src/search/views.py
+++ b/src/search/views.py
@@ -16,6 +16,7 @@
 from search.templatetags import search as search_template_tag
 from search.utils import get_query_info_for_model
 
+
 logger = logging.getLogger(__name__)
 
 
diff --git a/src/tools/admin.py b/src/tools/admin.py
index bc2d8bd77..cedfc9edb 100644
--- a/src/tools/admin.py
+++ b/src/tools/admin.py
@@ -1,6 +1,7 @@
 from core.admin import admin_site
 from tools.models import IrapToolData, IrapToolDataImport, Tool
 
+
 # Really crude admin, to be used for development
 
 admin_site.register(IrapToolData)
diff --git a/src/tools/models.py b/src/tools/models.py
index 8808df13d..0d6391c1a 100644
--- a/src/tools/models.py
+++ b/src/tools/models.py
@@ -1,10 +1,11 @@
-from content.models import ContentPage
 from django import forms
 from django.core.serializers.json import DjangoJSONEncoder
 from django.db import models
 from django.shortcuts import redirect
-from extended_search.index import DWIndexedField as IndexedField
 from wagtail.admin.panels import FieldPanel
+
+from content.models import ContentPage
+from extended_search.index import DWIndexedField as IndexedField
 from working_at_dit.models import PageWithTopics