diff --git a/app/config.py b/app/config.py
index eabd7391f..4232e2411 100644
--- a/app/config.py
+++ b/app/config.py
@@ -87,6 +87,8 @@ class Config(object):
         r"cqc\.org\.uk",
     ]
 
+    LOGO_UPLOAD_BUCKET_NAME = 'public-logos-local'
+
 
 class Development(Config):
     DEBUG = True
@@ -94,6 +96,7 @@ class Development(Config):
     SESSION_PROTECTION = None
     STATSD_ENABLED = False
     CSV_UPLOAD_BUCKET_NAME = 'development-notifications-csv-upload'
+    LOGO_UPLOAD_BUCKET_NAME = 'public-logos-tools'
 
 
 class Test(Development):
@@ -102,6 +105,7 @@ class Test(Development):
     STATSD_ENABLED = True
     WTF_CSRF_ENABLED = False
     CSV_UPLOAD_BUCKET_NAME = 'test-notifications-csv-upload'
+    LOGO_UPLOAD_BUCKET_NAME = 'public-logos-test'
     NOTIFY_ENVIRONMENT = 'test'
     TEMPLATE_PREVIEW_API_HOST = 'http://localhost:9999'
 
@@ -111,6 +115,7 @@ class Preview(Config):
     HEADER_COLOUR = '#F499BE'  # $baby-pink
     STATSD_ENABLED = True
     CSV_UPLOAD_BUCKET_NAME = 'preview-notifications-csv-upload'
+    LOGO_UPLOAD_BUCKET_NAME = 'public-logos-preview'
     NOTIFY_ENVIRONMENT = 'preview'
 
 
@@ -120,6 +125,7 @@ class Staging(Config):
     HEADER_COLOUR = '#6F72AF'  # $mauve
     STATSD_ENABLED = True
     CSV_UPLOAD_BUCKET_NAME = 'staging-notify-csv-upload'
+    LOGO_UPLOAD_BUCKET_NAME = 'public-logos-staging'
     NOTIFY_ENVIRONMENT = 'staging'
 
 
@@ -129,6 +135,7 @@ class Live(Config):
     HTTP_PROTOCOL = 'https'
     STATSD_ENABLED = True
     CSV_UPLOAD_BUCKET_NAME = 'live-notifications-csv-upload'
+    LOGO_UPLOAD_BUCKET_NAME = 'public-logos-live'
     NOTIFY_ENVIRONMENT = 'live'
 
 
@@ -142,6 +149,7 @@ class Sandbox(CloudFoundryConfig):
     HEADER_COLOUR = '#F499BE'  # $baby-pink
     STATSD_ENABLED = True
     CSV_UPLOAD_BUCKET_NAME = 'cf-sandbox-notifications-csv-upload'
+    LOGO_UPLOAD_BUCKET_NAME = 'cf-sandbox-notifications-logo-upload'
     NOTIFY_ENVIRONMENT = 'sandbox'
 
 
diff --git a/app/main/__init__.py b/app/main/__init__.py
index 506d07858..84f2b1d0b 100644
--- a/app/main/__init__.py
+++ b/app/main/__init__.py
@@ -28,6 +28,7 @@ from app.main.views import (
     providers,
     platform_admin,
     letter_jobs,
+    organisations,
     conversation,
     notifications
 )
diff --git a/app/main/forms.py b/app/main/forms.py
index 5f6560716..bc334ab41 100644
--- a/app/main/forms.py
+++ b/app/main/forms.py
@@ -26,6 +26,7 @@ from wtforms import (
     SelectField)
 from wtforms.fields.html5 import EmailField, TelField, SearchField
 from wtforms.validators import (DataRequired, Email, Length, Regexp, Optional)
+from flask_wtf.file import FileField as FileField_wtf, FileAllowed
 
 from app.main.validators import (Blacklist, CsvFileValidator, ValidGovEmail, NoCommasInPlaceHolders, OnlyGSMCharacters)
 
@@ -548,6 +549,28 @@ class ServiceBrandingOrg(Form):
     )
 
 
+class ServiceSelectOrg(Form):
+
+    def __init__(self, organisations=[], *args, **kwargs):
+        self.organisation.choices = organisations
+        super(ServiceSelectOrg, self).__init__(*args, **kwargs)
+
+    organisation = RadioField(
+        'Organisation',
+        validators=[
+            DataRequired()
+        ]
+    )
+
+
+class ServiceManageOrg(Form):
+
+    name = StringField('Name')
+
+    colour = StringField('Colour', render_kw={'onkeyup': 'update_colour_span()', 'onblur': 'update_colour_span()'})
+    file = FileField_wtf('Upload a PNG logo', validators=[FileAllowed(['png'], 'PNG Images only!')])
+
+
 class LetterBranding(Form):
 
     def __init__(self, choices=[], *args, **kwargs):
diff --git a/app/main/s3_client.py b/app/main/s3_client.py
new file mode 100644
index 000000000..75404ac5e
--- /dev/null
+++ b/app/main/s3_client.py
@@ -0,0 +1,102 @@
+import uuid
+import botocore
+from boto3 import resource
+from flask import current_app
+from notifications_utils.s3 import s3upload as utils_s3upload
+
+FILE_LOCATION_STRUCTURE = 'service-{}-notify/{}.csv'
+TEMP_TAG = 'temp-{user_id}_'
+LOGO_LOCATION_STRUCTURE = '{temp}{unique_id}-{filename}'
+
+
+def get_s3_object(bucket_name, filename):
+    s3 = resource('s3')
+    return s3.Object(bucket_name, filename)
+
+
+def delete_s3_object(filename):
+    bucket_name = current_app.config['LOGO_UPLOAD_BUCKET_NAME']
+    get_s3_object(bucket_name, filename).delete()
+
+
+def rename_s3_object(old_name, new_name):
+    bucket_name = current_app.config['LOGO_UPLOAD_BUCKET_NAME']
+    get_s3_object(bucket_name, new_name).copy_from(
+        CopySource='{}/{}'.format(bucket_name, old_name))
+    delete_s3_object(old_name)
+
+
+def get_s3_objects_filter_by_prefix(prefix):
+    bucket_name = current_app.config['LOGO_UPLOAD_BUCKET_NAME']
+    s3 = resource('s3')
+    return s3.Bucket(bucket_name).objects.filter(Prefix=prefix)
+
+
+def get_temp_truncated_filename(filename, user_id):
+    return filename[len(TEMP_TAG.format(user_id=user_id)):]
+
+
+def s3upload(service_id, filedata, region):
+    upload_id = str(uuid.uuid4())
+    upload_file_name = FILE_LOCATION_STRUCTURE.format(service_id, upload_id)
+    utils_s3upload(filedata=filedata['data'],
+                   region=region,
+                   bucket_name=current_app.config['CSV_UPLOAD_BUCKET_NAME'],
+                   file_location=upload_file_name)
+    return upload_id
+
+
+def s3download(service_id, upload_id):
+    contents = ''
+    try:
+        bucket_name = current_app.config['CSV_UPLOAD_BUCKET_NAME']
+        upload_file_name = FILE_LOCATION_STRUCTURE.format(service_id, upload_id)
+        key = get_s3_object(bucket_name, upload_file_name)
+        contents = key.get()['Body'].read().decode('utf-8')
+    except botocore.exceptions.ClientError as e:
+        current_app.logger.error("Unable to download s3 file {}".format(
+            FILE_LOCATION_STRUCTURE.format(service_id, upload_id)))
+        raise e
+    return contents
+
+
+def upload_logo(filename, filedata, region, user_id):
+    upload_file_name = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id),
+        unique_id=str(uuid.uuid4()),
+        filename=filename
+    )
+    bucket_name = current_app.config['LOGO_UPLOAD_BUCKET_NAME']
+    utils_s3upload(
+        filedata=filedata,
+        region=region,
+        bucket_name=bucket_name,
+        file_location=upload_file_name,
+        content_type='image/png'
+    )
+
+    return upload_file_name
+
+
+def persist_logo(filename, user_id):
+    if filename.startswith(TEMP_TAG.format(user_id=user_id)):
+        persisted_filename = get_temp_truncated_filename(
+            filename=filename, user_id=user_id)
+    else:
+        return filename
+
+    rename_s3_object(filename, persisted_filename)
+
+    return persisted_filename
+
+
+def delete_temp_files_created_by(user_id):
+    for obj in get_s3_objects_filter_by_prefix(TEMP_TAG.format(user_id=user_id)):
+        delete_s3_object(obj.key)
+
+
+def delete_temp_file(filename):
+    if not filename.startswith(TEMP_TAG[:5]):
+        raise ValueError('Not a temp file: {}'.format(filename))
+
+    delete_s3_object(filename)
diff --git a/app/main/uploader.py b/app/main/uploader.py
deleted file mode 100644
index 4c00fbce5..000000000
--- a/app/main/uploader.py
+++ /dev/null
@@ -1,32 +0,0 @@
-import uuid
-import botocore
-from boto3 import resource
-from flask import current_app
-from notifications_utils.s3 import s3upload as utils_s3upload
-
-FILE_LOCATION_STRUCTURE = 'service-{}-notify/{}.csv'
-
-
-def s3upload(service_id, filedata, region):
-    upload_id = str(uuid.uuid4())
-    upload_file_name = FILE_LOCATION_STRUCTURE.format(service_id, upload_id)
-    utils_s3upload(filedata=filedata['data'],
-                   region=region,
-                   bucket_name=current_app.config['CSV_UPLOAD_BUCKET_NAME'],
-                   file_location=upload_file_name)
-    return upload_id
-
-
-def s3download(service_id, upload_id):
-    contents = ''
-    try:
-        s3 = resource('s3')
-        bucket_name = current_app.config['CSV_UPLOAD_BUCKET_NAME']
-        upload_file_name = FILE_LOCATION_STRUCTURE.format(service_id, upload_id)
-        key = s3.Object(bucket_name, upload_file_name)
-        contents = key.get()['Body'].read().decode('utf-8')
-    except botocore.exceptions.ClientError as e:
-        current_app.logger.error("Unable to download s3 file {}".format(
-            FILE_LOCATION_STRUCTURE.format(service_id, upload_id)))
-        raise e
-    return contents
diff --git a/app/main/views/organisations.py b/app/main/views/organisations.py
new file mode 100644
index 000000000..0fe976752
--- /dev/null
+++ b/app/main/views/organisations.py
@@ -0,0 +1,97 @@
+from flask import current_app, redirect, render_template, session, url_for, request
+from flask_login import login_required
+
+from app import organisations_client
+from app.main import main
+from app.main.forms import (
+    ServiceSelectOrg,
+    ServiceManageOrg)
+from app.utils import user_has_permissions, get_cdn_domain
+from app.main.s3_client import (
+    TEMP_TAG,
+    upload_logo,
+    delete_temp_file,
+    delete_temp_files_created_by,
+    persist_logo
+)
+from app.main.views.service_settings import get_branding_as_value_and_label, get_branding_as_dict
+
+
+@main.route("/organisations", methods=['GET', 'POST'])
+@main.route("/organisations/<organisation_id>", methods=['GET', 'POST'])
+@login_required
+@user_has_permissions(admin_override=True)
+def organisations(organisation_id=None):
+    orgs = organisations_client.get_organisations()
+
+    form = ServiceSelectOrg()
+    form.organisation.choices = get_branding_as_value_and_label(orgs) + [('None', 'Create a new organisation')]
+
+    if form.validate_on_submit():
+        if form.organisation.data != 'None':
+            session['organisation'] = [o for o in orgs if o['id'] == form.organisation.data][0]
+        elif session.get('organisation'):
+            del session['organisation']
+
+        return redirect(url_for('.manage_org'))
+
+    form.organisation.data = organisation_id if organisation_id in [o['id'] for o in orgs] else 'None'
+
+    return render_template(
+        'views/organisations/select-org.html',
+        form=form,
+        branding_dict=get_branding_as_dict(orgs),
+        organisation_id=organisation_id
+    )
+
+
+@main.route("/organisations/manage", methods=['GET', 'POST'])
+@main.route("/organisations/manage/<logo>", methods=['GET', 'POST'])
+@login_required
+@user_has_permissions(admin_override=True)
+def manage_org(logo=None):
+    form = ServiceManageOrg()
+
+    org = session.get("organisation")
+
+    logo = logo if logo else org.get('logo') if org else None
+
+    if form.validate_on_submit():
+        if form.file.data:
+            upload_filename = upload_logo(
+                form.file.data.filename,
+                form.file.data,
+                current_app.config['AWS_REGION'],
+                user_id=session["user_id"]
+            )
+
+            if logo and logo.startswith(TEMP_TAG.format(user_id=session['user_id'])):
+                delete_temp_file(logo)
+
+            return redirect(
+                url_for('.manage_org', logo=upload_filename))
+
+        logo = persist_logo(logo, session["user_id"])
+        delete_temp_files_created_by(session["user_id"])
+
+        if org:
+            organisations_client.update_organisation(
+                org_id=org['id'], logo=logo, name=form.name.data, colour=form.colour.data)
+            org_id = org['id']
+        else:
+            resp = organisations_client.create_organisation(
+                logo=logo, name=form.name.data, colour=form.colour.data)
+            org_id = resp['data']['id']
+
+        return redirect(url_for('.organisations', organisation_id=org_id))
+    if org:
+        form.name.data = org['name']
+        form.colour.data = org['colour']
+
+    return render_template(
+        'views/organisations/manage-org.html',
+        form=form,
+        organisation=org,
+        cdn_url=get_cdn_domain(),
+        logo=logo
+    )
diff --git a/app/main/views/send.py b/app/main/views/send.py
index 557faf0ba..354c5c8e2 100644
--- a/app/main/views/send.py
+++ b/app/main/views/send.py
@@ -33,7 +33,7 @@ from app.main.forms import (
     ChooseTimeForm,
     get_placeholder_form_instance
 )
-from app.main.uploader import (
+from app.main.s3_client import (
     s3upload,
     s3download
 )
diff --git a/app/notify_client/organisations_client.py b/app/notify_client/organisations_client.py
index bf4717976..aae8d4c07 100644
--- a/app/notify_client/organisations_client.py
+++ b/app/notify_client/organisations_client.py
@@ -19,3 +19,19 @@ class OrganisationsClient(NotifyAdminAPIClient):
 
     def get_letter_organisations(self):
         return self.get(url='/dvla_organisations')
+
+    def create_organisation(self, logo, name, colour):
+        data = {
+            "logo": logo,
+            "name": name,
+            "colour": colour
+        }
+        return self.post(url="/organisation", data=data)
+
+    def update_organisation(self, org_id, logo, name, colour):
+        data = {
+            "logo": logo,
+            "name": name,
+            "colour": colour
+        }
+        return self.post(url="/organisation/{}".format(org_id), data=data)
diff --git a/app/templates/components/page-footer.html b/app/templates/components/page-footer.html
index 5dcc69e4f..74b847a0c 100644
--- a/app/templates/components/page-footer.html
+++ b/app/templates/components/page-footer.html
@@ -6,12 +6,13 @@
   secondary_link=False,
   secondary_link_text=None,
   delete_link=False,
-  delete_link_text="delete"
+  delete_link_text="delete",
+  button_disabled=False
 ) %}
   <div class="page-footer">
     {% if button_text %}
       <input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
-      <input type="submit" class="button{% if destructive %}-destructive{% endif %}" value="{{ button_text }}" />
+      <input type="submit" class="button{% if destructive %}-destructive{% endif %}" value="{{ button_text }}"{% if button_disabled %} disabled{% endif %}/>
     {% endif %}
     {% if back_link %}
       <a class="page-footer-back-link" href="{{ back_link }}">{{ back_link_text }}</a>
diff --git a/app/templates/components/radios.html b/app/templates/components/radios.html
index f00ba49b4..fad33d8fe 100644
--- a/app/templates/components/radios.html
+++ b/app/templates/components/radios.html
@@ -79,16 +79,19 @@
 {% macro branding_radios(
   field,
   hint=None,
-  branding_dict={}
+  branding_dict={},
+  show_header=True
 ) %}
   <div class="form-group {% if field.errors %} form-group-error{% endif %}">
     <fieldset>
       <legend class="form-label">
-        {{ field.label.text }}
+        {% if show_header %}
+          {{ field.label.text }}
+        {% endif %}
         {% if field.errors %}
-          <span class="error-message">
-            {{ field.errors[0] }}
-          </span>
+            <span class="error-message">
+              {{ field.errors[0] }}
+            </span>
         {% endif %}
       </legend>
       {% for value, option, checked in field.iter_choices() %}
@@ -102,7 +105,7 @@
           />
           <label class="block-label" for="{{ field.name }}-{{ loop.index }}">
             {% if branding_dict.get(value, {}).get('colour') %}
-              <span style="background: {{ branding_dict[value].colour }}; display: inline-block; width: 3px; height: 27px"></span>
+              <span style="background: {{ branding_dict[value].colour }}; display: inline-block; width: 3px; height: 27px;"></span>
             {% endif %}
             {% if branding_dict.get(value, {}).get('logo') %}
               <img
diff --git a/app/templates/views/organisations/manage-org.html b/app/templates/views/organisations/manage-org.html
new file mode 100644
index 000000000..3457230f4
--- /dev/null
+++ b/app/templates/views/organisations/manage-org.html
@@ -0,0 +1,55 @@
+{% extends "views/platform-admin/_base_template.html" %}
+{% from "components/file-upload.html" import file_upload %}
+{% from "components/page-footer.html" import page_footer %}
+{% from "components/textbox.html" import textbox %}
+
+{% block service_page_title %}
+  {{ '{} an organisations logo'.format('Update' if organisation else 'Create')}}
+{% endblock %}
+
+{% block platform_admin_content %}
+
+  <h1 class="heading-large">{{ '{} an organisations logo'.format('Update' if organisation else 'Create')}}</h1>
+  <div class="grid-row">
+    <div class="column-three-quarters">
+
+      {% if logo %}
+        <div id="logo-img">
+          <img src="https://{{ cdn_url }}/{{ logo }}"/>
+        </div>
+      {% endif %}
+      {{
+        file_upload(
+        form.file,
+        button_text='{} logo'.format('Update' if organisation else 'Upload')
+      ) }}
+      <form method="post">
+        <div class="form-group">
+          <div style='margin-top:15px;'>{{textbox(form.name)}}</div>
+          <div>{{textbox(form.colour, width='1-4')}} 
+            <span id='colour_span' style="background: {{ organisation.colour }}; {% if not organisation.colour %}visibility:hidden; {% endif %}border:1px black solid; width: 3px; height: 25px;position:absolute;margin-top:138px;margin-left:135px;display:block;"></span>
+          </div>
+        {{ page_footer(
+          'Save',
+          back_link=url_for('.organisations', organisation_id=organisation.id if organisation else 'None'),
+          back_link_text='Back to organisation selection',
+          button_disabled=True if not logo else False
+        ) }}
+        </div>
+      </form>
+    </div>
+  </div>
+
+  <script type="text/javascript">
+    function update_colour_span() {
+      document.getElementById('colour_span').style.background = '';
+      if (document.getElementById('colour').value) {
+        document.getElementById('colour_span').style.visibility =  'visible';
+        document.getElementById('colour_span').style.background = document.getElementById('colour').value;
+      }
+      else {
+        document.getElementById('colour_span').style.visibility =  'hidden';
+      }
+    }
+  </script>
+{% endblock %}
diff --git a/app/templates/views/organisations/select-org.html b/app/templates/views/organisations/select-org.html
new file mode 100644
index 000000000..b1ebc9dbd
--- /dev/null
+++ b/app/templates/views/organisations/select-org.html
@@ -0,0 +1,26 @@
+{% extends "views/platform-admin/_base_template.html" %}
+{% from "components/radios.html" import radios, branding_radios %}
+{% from "components/page-footer.html" import page_footer %}
+
+{% block service_page_title %}
+  Select organisation
+{% endblock %}
+
+{% block platform_admin_content %}
+
+  <h1 class="heading-large">
+    <div>Select an organisation to update</div>
+    <div>or create a new organisation</div>
+  </h1>
+  <div class="grid-row">
+    <div class="column-three-quarters">
+      <form method="post">
+        {{ branding_radios(form.organisation, branding_dict=branding_dict, show_header=False) }}
+        {{ page_footer(
+          'Next'
+        ) }}
+      </form>
+    </div>
+  </div>
+
+{% endblock %}
diff --git a/app/templates/views/platform-admin/_base_template.html b/app/templates/views/platform-admin/_base_template.html
index d48756cab..8b245b40d 100644
--- a/app/templates/views/platform-admin/_base_template.html
+++ b/app/templates/views/platform-admin/_base_template.html
@@ -16,6 +16,7 @@
           ('Live services', url_for('main.live_services')),
           ('Trial mode services', url_for('main.trial_services')),
           ('Providers', url_for('main.view_providers')),
+          ('Organisations', url_for('main.organisations')),
           ('Letter jobs', url_for('main.letter_jobs'))
         ] %}
           <li>
diff --git a/tests/app/main/test_s3_client.py b/tests/app/main/test_s3_client.py
new file mode 100644
index 000000000..d86e03b20
--- /dev/null
+++ b/tests/app/main/test_s3_client.py
@@ -0,0 +1,95 @@
+from collections import namedtuple
+from unittest.mock import call
+import pytest
+
+from app.main.s3_client import (
+    upload_logo,
+    persist_logo,
+    delete_temp_file,
+    delete_temp_files_created_by,
+    get_temp_truncated_filename,
+    LOGO_LOCATION_STRUCTURE,
+    TEMP_TAG
+)
+
+bucket = 'test_bucket'
+data = {'data': 'some_data'}
+filename = 'test.png'
+upload_id = 'test_uuid'
+region = 'eu-west1'
+
+
+@pytest.fixture
+def upload_filename(fake_uuid):
+    return LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=fake_uuid), unique_id=upload_id, filename=filename)
+
+
+def test_upload_logo_calls_correct_args(client, mocker, fake_uuid, upload_filename):
+    mocker.patch('uuid.uuid4', return_value=upload_id)
+    mocker.patch.dict('flask.current_app.config', {'LOGO_UPLOAD_BUCKET_NAME': bucket})
+    mocked_s3_upload = mocker.patch('app.main.s3_client.utils_s3upload')
+
+    upload_logo(filename=filename, user_id=fake_uuid, filedata=data, region=region)
+
+    assert mocked_s3_upload.called_once_with(
+        filedata=data,
+        region=region,
+        file_location=upload_filename,
+        bucket_name=bucket
+    )
+
+
+def test_persist_logo(client, mocker, fake_uuid, upload_filename):
+    mocker.patch.dict('flask.current_app.config', {'LOGO_UPLOAD_BUCKET_NAME': bucket})
+    mocked_rename_s3_object = mocker.patch('app.main.s3_client.rename_s3_object')
+
+    persisted_filename = persist_logo(filename=upload_filename, user_id=fake_uuid)
+
+    assert mocked_rename_s3_object.called_once_with(
+        upload_filename, get_temp_truncated_filename(upload_filename, fake_uuid))
+    assert persisted_filename == get_temp_truncated_filename(upload_filename, fake_uuid)
+
+
+def test_persist_logo_returns_if_not_temp(client, mocker, fake_uuid):
+    filename = 'logo.png'
+    mocker.patch.dict('flask.current_app.config', {'LOGO_UPLOAD_BUCKET_NAME': bucket})
+    mocked_rename_s3_object = mocker.patch('app.main.s3_client.rename_s3_object')
+
+    persisted_filename = persist_logo(filename=filename, user_id=fake_uuid)
+
+    assert not mocked_rename_s3_object.called
+    assert persisted_filename == filename
+
+
+def test_delete_temp_files_created_by_user(client, mocker, fake_uuid):
+    obj = namedtuple("obj", ["key"])
+    objs = [obj(key='test1'), obj(key='test2')]
+
+    mocker.patch('app.main.s3_client.get_s3_objects_filter_by_prefix', return_value=objs)
+    mocked_delete_s3_object = mocker.patch('app.main.s3_client.delete_s3_object')
+
+    delete_temp_files_created_by(fake_uuid)
+
+    assert mocked_delete_s3_object.called_with_args(objs[0].key)
+    for index, arg in enumerate(mocked_delete_s3_object.call_args_list):
+        assert arg == call(objs[index].key)
+
+
+def test_delete_single_temp_file(client, mocker, fake_uuid, upload_filename):
+    mocked_delete_s3_object = mocker.patch('app.main.s3_client.delete_s3_object')
+
+    delete_temp_file(upload_filename)
+
+    assert mocked_delete_s3_object.called_with_args(upload_filename)
+
+
+def test_does_not_delete_non_temp_file(client, mocker, fake_uuid):
+    filename = 'logo.png'
+    mocked_delete_s3_object = mocker.patch('app.main.s3_client.delete_s3_object')
+
+    with pytest.raises(ValueError) as error:
+        delete_temp_file(filename)
+
+    assert mocked_delete_s3_object.called_with_args(filename)
+    assert str(error.value) == 'Not a temp file: {}'.format(filename)
diff --git a/tests/app/main/views/test_organisations.py b/tests/app/main/views/test_organisations.py
new file mode 100644
index 000000000..82a6cdee6
--- /dev/null
+++ b/tests/app/main/views/test_organisations.py
@@ -0,0 +1,264 @@
+from io import BytesIO
+from unittest.mock import call
+
+from bs4 import BeautifulSoup
+from flask import url_for
+import pytest
+
+from app.main.s3_client import TEMP_TAG, LOGO_LOCATION_STRUCTURE
+
+sample_orgs = [
+    {'id': '1', 'name': 'org 1', 'colour': 'red', 'logo': 'logo1.png'},
+    {'id': '2', 'name': 'org 2', 'colour': 'orange', 'logo': 'logo2.png'},
+    {'id': '3', 'name': None, 'colour': None, 'logo': 'logo3.png'},
+    {'id': '4', 'name': 'org 4', 'colour': None, 'logo': 'logo4.png'},
+    {'id': '5', 'name': None, 'colour': 'blue', 'logo': 'logo5.png'},
+]
+
+
+@pytest.fixture
+def request_get_manage_org_with_org(logged_in_platform_admin_client):
+    with logged_in_platform_admin_client.session_transaction() as session:
+        session['organisation'] = sample_orgs[0]
+
+    response = logged_in_platform_admin_client.get(
+        url_for('.manage_org')
+    )
+    assert response.status_code == 200
+    return BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+
+@pytest.fixture
+def request_get_manage_org_without_org(logged_in_platform_admin_client):
+    response = logged_in_platform_admin_client.get(
+        url_for('.manage_org')
+    )
+    assert response.status_code == 200
+    return BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+
+def test_organisations_page_shows_full_orgs_list(logged_in_platform_admin_client, mocker):
+    mocker.patch('app.organisations_client.get_organisations', return_value=sample_orgs)
+
+    response = logged_in_platform_admin_client.get(
+        url_for('.organisations')
+    )
+
+    assert response.status_code == 200
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+    assert ' '.join(page.find('h1').text.split()) == "Select an organisation to update or create a new organisation"
+    for index, label in enumerate(page.select('div.multiple-choice > label')):
+        if index < len(sample_orgs):
+            if sample_orgs[index]['colour']:
+                assert 'background: {};'.format(sample_orgs[index]['colour']) in label.find('span')['style']
+
+            assert ' '.join(label.text.split()) == str(sample_orgs[index]['name'])
+            assert label.find('img')['src'].endswith('/' + sample_orgs[index]['logo'])
+        else:
+            assert ' '.join(label.text.split()) == 'Create a new organisation'
+
+
+@pytest.mark.parametrize("org_id", [
+    'None', '1', '2'
+])
+def test_organisations_radio_default_to_just_updated_or_new_org(
+        logged_in_platform_admin_client, mocker, org_id):
+    mocker.patch('app.organisations_client.get_organisations', return_value=sample_orgs)
+
+    response = logged_in_platform_admin_client.get(
+        url_for('.organisations', organisation_id=org_id)
+    )
+
+    assert response.status_code == 200
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+    selected = [r for r in page.select('div.multiple-choice > input') if r.attrs.get('checked')][0]
+    assert selected["value"] == org_id
+
+
+def test_organisations_post_sets_organisation_in_session_after_selecting_org(
+        logged_in_platform_admin_client, mocker):
+    mocker.patch('app.organisations_client.get_organisations', return_value=sample_orgs)
+    response = logged_in_platform_admin_client.post(
+        url_for('.organisations'),
+        data={'organisation': sample_orgs[0]['id']}
+    )
+    with logged_in_platform_admin_client.session_transaction() as session:
+        assert session['organisation'] == sample_orgs[0]
+    assert response.status_code == 302
+    assert response.location == url_for('.manage_org', _external=True)
+
+
+def test_organisations_post_deletes_organisation_session_on_new_org(
+        logged_in_platform_admin_client, mocker):
+    mocker.patch('app.organisations_client.get_organisations', return_value=sample_orgs)
+    with logged_in_platform_admin_client.session_transaction() as session:
+        session['organisation'] = sample_orgs[0]
+
+    response = logged_in_platform_admin_client.post(
+        url_for('.organisations'),
+        data={'organisation': 'None'}
+    )
+
+    with logged_in_platform_admin_client.session_transaction() as session:
+        assert session.get('organisation') is None
+    assert response.status_code == 302
+    assert response.location == url_for('.manage_org', _external=True)
+
+
+def test_manage_orgs_shows_correct_org_info(request_get_manage_org_with_org):
+    assert request_get_manage_org_with_org.select_one('#logo-img > img')['src'].endswith('/' + sample_orgs[0]['logo'])
+    assert request_get_manage_org_with_org.select_one('#name').attrs.get('value') == sample_orgs[0]['name']
+    assert request_get_manage_org_with_org.select_one('#colour').attrs.get('value') == sample_orgs[0]['colour']
+
+
+def test_manage_orgs_does_not_show_data_for_new_org(request_get_manage_org_without_org):
+    assert request_get_manage_org_without_org.select_one('div.page-footer input.button').has_attr('disabled')
+    assert request_get_manage_org_without_org.select_one('#logo-img > img') is None
+    assert request_get_manage_org_without_org.select_one('#name').attrs.get('value') == ''
+    assert request_get_manage_org_without_org.select_one('#colour').attrs.get('value') == ''
+
+
+def test_save_is_enabled_when_logo_is_set(request_get_manage_org_with_org):
+    assert request_get_manage_org_with_org.select_one('div.page-footer input.button').has_attr('disabled') is False
+
+
+def test_save_is_disabled_when_logo_is_not_set(request_get_manage_org_without_org):
+    assert request_get_manage_org_without_org.select_one('div.page-footer input.button').has_attr('disabled')
+
+
+@pytest.fixture
+def request_post_manage_org_redirect(logged_in_platform_admin_client, mocker, fake_uuid):
+    with logged_in_platform_admin_client.session_transaction() as session:
+        user_id = session["user_id"]
+
+    temp_filename = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename='test.png')
+
+    mocker.patch('app.main.views.organisations.upload_logo', return_value=temp_filename)
+    mocker.patch('app.main.views.organisations.delete_temp_file')
+    mocker.patch('app.main.views.organisations.delete_temp_files_created_by')
+
+    response = logged_in_platform_admin_client.post(
+        url_for('.manage_org'),
+        data={'file': (BytesIO(''.encode('utf-8')), 'test.png')},
+        content_type='multipart/form-data',
+        follow_redirects=True
+    )
+
+    assert response.status_code == 200
+    return BeautifulSoup(response.data.decode('utf-8'), 'html.parser'), temp_filename
+
+
+def test_shows_temp_logo_after_uploading_logo(request_post_manage_org_redirect):
+    page, temp_filename = request_post_manage_org_redirect
+    assert page.select_one('#logo-img > img').attrs['src'].endswith(temp_filename)
+
+
+def test_save_enabled_after_uploading_logo(request_post_manage_org_redirect):
+    page, _ = request_post_manage_org_redirect
+    assert not page.select_one('div.page-footer input.button').has_attr('disabled')
+
+
+def test_deletes_previous_temp_logo_after_uploading_logo(logged_in_platform_admin_client, mocker, fake_uuid):
+    with logged_in_platform_admin_client.session_transaction() as session:
+        user_id = session["user_id"]
+
+    temp_old_filename = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename='old_test.png')
+    temp_filename = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename='test.png')
+
+    mocked_upload_logo = mocker.patch(
+        'app.main.views.organisations.upload_logo',
+        return_value=temp_filename
+    )
+    mocked_delete_temp_file = mocker.patch('app.main.views.organisations.delete_temp_file')
+
+    logged_in_platform_admin_client.post(
+        url_for('.manage_org', logo=temp_old_filename),
+        data={'file': (BytesIO(''.encode('utf-8')), 'test.png')},
+        content_type='multipart/form-data'
+    )
+
+    assert mocked_upload_logo.called
+    assert mocked_delete_temp_file.called
+    assert mocked_delete_temp_file.call_args == call(temp_old_filename)
+
+
+def test_logo_persisted_when_organisation_saved(logged_in_platform_admin_client, mocker, fake_uuid):
+    with logged_in_platform_admin_client.session_transaction() as session:
+        user_id = session["user_id"]
+
+    temp_filename = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename='test.png')
+
+    mocked_upload_logo = mocker.patch('app.main.views.organisations.upload_logo')
+    mocked_persist_logo = mocker.patch('app.main.views.organisations.persist_logo', return_value='test.png')
+    mocked_delete_temp_files_by = mocker.patch('app.main.views.organisations.delete_temp_files_created_by')
+
+    logged_in_platform_admin_client.post(
+        url_for('.manage_org', logo=temp_filename),
+        content_type='multipart/form-data'
+    )
+
+    assert not mocked_upload_logo.called
+    assert mocked_persist_logo.called
+    assert mocked_delete_temp_files_by.called
+    assert mocked_delete_temp_files_by.call_args == call(user_id)
+
+
+def test_existing_organisation_updated_when_organisation_saved(logged_in_platform_admin_client, mocker, fake_uuid):
+    with logged_in_platform_admin_client.session_transaction() as session:
+        session["organisation"] = sample_orgs[0]
+        user_id = session["user_id"]
+
+    update_org = {'logo': 'test.png', 'colour': 'blue', 'name': 'new name'}
+
+    temp_filename = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename=update_org['logo'])
+
+    mocked_update_org = mocker.patch('app.organisations_client.update_organisation')
+    mocker.patch('app.main.views.organisations.persist_logo', return_value=update_org['logo'])
+    mocker.patch('app.main.views.organisations.delete_temp_files_created_by')
+
+    logged_in_platform_admin_client.post(
+        url_for('.manage_org', logo=temp_filename),
+        content_type='multipart/form-data',
+        data={'colour': update_org['colour'], 'name': update_org['name'], 'cdn_url': 'https://static-logos.cdn.com'}
+    )
+
+    assert mocked_update_org.called
+    assert mocked_update_org.call_args == call(
+        org_id=sample_orgs[0]['id'],
+        logo=update_org['logo'],
+        name=update_org['name'],
+        colour=update_org['colour']
+    )
+
+
+def test_create_new_organisation_when_organisation_saved(logged_in_platform_admin_client, mocker, fake_uuid):
+    with logged_in_platform_admin_client.session_transaction() as session:
+        user_id = session["user_id"]
+
+    new_org = {'logo': 'test.png', 'colour': 'red', 'name': 'new name'}
+
+    temp_filename = LOGO_LOCATION_STRUCTURE.format(
+        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename=new_org['logo'])
+
+    mocked_new_org = mocker.patch('app.organisations_client.create_organisation')
+    mocker.patch('app.main.views.organisations.persist_logo', return_value=new_org['logo'])
+    mocker.patch('app.main.views.organisations.delete_temp_files_created_by')
+
+    logged_in_platform_admin_client.post(
+        url_for('.manage_org', logo=temp_filename),
+        content_type='multipart/form-data',
+        data={'colour': new_org['colour'], 'name': new_org['name'], 'cdn_url': 'https://static-logos.cdn.com'}
+    )
+
+    assert mocked_new_org.called
+    assert mocked_new_org.call_args == call(
+        logo=new_org['logo'],
+        name=new_org['name'],
+        colour=new_org['colour']
+    )
diff --git a/tests/app/notify_client/test_organisations_client.py b/tests/app/notify_client/test_organisations_client.py
new file mode 100644
index 000000000..a0eaa3d1c
--- /dev/null
+++ b/tests/app/notify_client/test_organisations_client.py
@@ -0,0 +1,50 @@
+from app.notify_client.organisations_client import OrganisationsClient
+
+
+def test_get_organisation(mocker, fake_uuid):
+    mock_get = mocker.patch('app.notify_client.organisations_client.OrganisationsClient.get')
+    OrganisationsClient().get_organisation(fake_uuid)
+    mock_get.assert_called_once_with(
+        url='/organisation/{}'.format(fake_uuid)
+    )
+
+
+def test_get_organisations(mocker):
+    mock_get = mocker.patch('app.notify_client.organisations_client.OrganisationsClient.get')
+    OrganisationsClient().get_organisations()
+    mock_get.assert_called_once_with(
+        url='/organisation'
+    )
+
+
+def test_get_letter_organisations(mocker):
+    mock_get = mocker.patch('app.notify_client.organisations_client.OrganisationsClient.get')
+    OrganisationsClient().get_letter_organisations()
+    mock_get.assert_called_once_with(
+        url='/dvla_organisations'
+    )
+
+
+def test_create_organisations(mocker):
+    org_data = {'logo': 'test.png', 'name': 'test name', 'colour': 'red'}
+
+    mock_post = mocker.patch('app.notify_client.organisations_client.OrganisationsClient.post')
+    OrganisationsClient().create_organisation(logo=org_data['logo'], name=org_data['name'], colour=org_data['colour'])
+
+    mock_post.assert_called_once_with(
+        url='/organisation',
+        data=org_data
+    )
+
+
+def test_update_organisations(mocker, fake_uuid):
+    org_data = {'logo': 'test.png', 'name': 'test name', 'colour': 'red'}
+
+    mock_post = mocker.patch('app.notify_client.organisations_client.OrganisationsClient.post')
+    OrganisationsClient().update_organisation(
+        org_id=fake_uuid, logo=org_data['logo'], name=org_data['name'], colour=org_data['colour'])
+
+    mock_post.assert_called_once_with(
+        url='/organisation/{}'.format(fake_uuid),
+        data=org_data
+    )