diff --git a/.simplecov b/.simplecov
index 49889aa450..fcb17c2de8 100644
--- a/.simplecov
+++ b/.simplecov
@@ -7,6 +7,7 @@ SimpleCov.start "rails" do
   add_filter "lib/tasks/helpers/cfe_payload_recorder.rb"
   add_filter "lib/tasks/helpers/cy_helper.rb"
   add_filter "lib/utilities/redis_scanner.rb"
+  add_filter "app/jobs/test_mail_job.rb"
 
   enable_coverage :branch
 
diff --git a/app/jobs/test_mail_job.rb b/app/jobs/test_mail_job.rb
new file mode 100644
index 0000000000..e5bb65aeed
--- /dev/null
+++ b/app/jobs/test_mail_job.rb
@@ -0,0 +1,19 @@
+class TestMailJob
+  include Sidekiq::Worker
+  sidekiq_options queue: :default
+
+  CLIENT_CONFIRMATION_EMAIL = "3b18efe5-7d09-4042-927c-7d1ae03fdd7e".freeze
+
+  def perform(email, name)
+    client = Notifications::Client.new(Rails.configuration.x.govuk_notify_api_key)
+
+    client.send_email(
+      email_address: email,
+      template_id: CLIENT_CONFIRMATION_EMAIL,
+      personalisation: {
+        client_name: name,
+        ref_number: "testing-whatever",
+      },
+    )
+  end
+end
diff --git a/config/application.rb b/config/application.rb
index 9ea61db7bd..97bba71407 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -142,7 +142,16 @@ class Application < Rails::Application
       production: [],
     }
 
-    config.x.redis.base_url = ENV["REDIS_HOST"].present? && ENV["REDIS_PASSWORD"].present? ? "rediss://:#{ENV.fetch('REDIS_PASSWORD', nil)}@#{ENV.fetch('REDIS_HOST', nil)}:6379" : "redis://localhost:6379"
+    redis_protocol = ENV.fetch("REDIS_PROTOCOL", "rediss")
+    redis_password = ENV.fetch("REDIS_PASSWORD", nil)
+    redis_host = ENV.fetch("REDIS_HOST", nil)
+
+    redis_url = if redis_host.present? && redis_password.present?
+                  "#{redis_protocol}://:#{redis_password}@#{redis_host}:6379"
+                else
+                  "redis://localhost:6379"
+                end
+    config.x.redis.base_url = redis_url
     config.x.redis.page_history_url = "#{config.x.redis.base_url}/1"
     config.x.redis.oauth_session_url = "#{config.x.redis.base_url}/2"
     config.x.redis.rack_attack_url = "#{config.x.redis.base_url}/3"
diff --git a/config/initializers/sidekiq.rb b/config/initializers/sidekiq.rb
index ce03f2251b..dc353d30a7 100644
--- a/config/initializers/sidekiq.rb
+++ b/config/initializers/sidekiq.rb
@@ -3,20 +3,26 @@
 require "prometheus_exporter/client"
 require "prometheus_exporter/instrumentation"
 
-redis_url = "rediss://:#{ENV.fetch('REDIS_PASSWORD', nil)}@#{ENV.fetch('REDIS_HOST', nil)}:6379" if ENV["REDIS_HOST"].present? && ENV["REDIS_PASSWORD"].present?
+redis_url = Rails.configuration.x.redis.base_url
 namespace = ENV.fetch("HOST", "laa-apply")
 
 module Dashboard; end
 
 Sidekiq.configure_client do |config|
-  config.redis = { url: redis_url, namespace: } if redis_url
+  config.redis = { url: redis_url } if redis_url
 
   # accepts :expiration (optional)
   Sidekiq::Status.configure_client_middleware config, expiration: 30.minutes
 end
 
 Sidekiq.configure_server do |config|
-  config.redis = { url: redis_url, namespace: } if redis_url
+  if redis_url
+    config.redis = if ENV.fetch("NAMEPSPACED_SIDEKIQ_DRAINER", nil)
+                     { url: redis_url, namespace: } # continue to poll for old scheduled jobs and retries
+                   else
+                     { url: redis_url }
+                   end
+  end
 
   # accepts :expiration (optional)
   Sidekiq::Status.configure_server_middleware config, expiration: 30.minutes
diff --git a/helm_deploy/apply-for-legal-aid/Chart.lock b/helm_deploy/apply-for-legal-aid/Chart.lock
index dede4da068..7b6a450057 100644
--- a/helm_deploy/apply-for-legal-aid/Chart.lock
+++ b/helm_deploy/apply-for-legal-aid/Chart.lock
@@ -2,5 +2,8 @@ dependencies:
 - name: postgresql
   repository: https://charts.bitnami.com/bitnami
   version: 11.9.13
-digest: sha256:63f0418b276607f2047c1ea7d149ac904de530404e74ef4f7558da6f645137b9
-generated: "2023-02-20T17:20:40.628833Z"
+- name: redis
+  repository: https://charts.bitnami.com/bitnami
+  version: 16.13.2
+digest: sha256:334d2a8d2b464929a6c9534bdd4efb53e3f1c9a9a3f172c7851286dcfeda53fd
+generated: "2023-10-13T14:00:08.90648+01:00"
diff --git a/helm_deploy/apply-for-legal-aid/Chart.yaml b/helm_deploy/apply-for-legal-aid/Chart.yaml
index 5edefa56e6..bb59f4082a 100644
--- a/helm_deploy/apply-for-legal-aid/Chart.yaml
+++ b/helm_deploy/apply-for-legal-aid/Chart.yaml
@@ -1,3 +1,5 @@
+# see https://levelup.gitconnected.com/helm-dependencies-1907facbe410
+# for decent documentation.
 apiVersion: v2
 name: apply-for-legal-aid
 description: A Helm chart for Kubernetes
@@ -15,15 +17,19 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.2.0
+version: 0.3.0
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
-appVersion: 1.17.0
+appVersion: 1.18.0
 
 dependencies:
   - name: postgresql
     version: ^11.0.0
     condition: postgresql.enabled
     repository: https://charts.bitnami.com/bitnami
+  - name: redis
+    version: ^16.0.0 # redis 6.x.x
+    condition: redis.enabled
+    repository: https://charts.bitnami.com/bitnami
diff --git a/helm_deploy/apply-for-legal-aid/charts/redis-16.13.2.tgz b/helm_deploy/apply-for-legal-aid/charts/redis-16.13.2.tgz
new file mode 100644
index 0000000000..33b5e967b8
Binary files /dev/null and b/helm_deploy/apply-for-legal-aid/charts/redis-16.13.2.tgz differ
diff --git a/helm_deploy/apply-for-legal-aid/templates/_envs.tpl b/helm_deploy/apply-for-legal-aid/templates/_envs.tpl
index 18ce1a452a..ebe08c2bfc 100644
--- a/helm_deploy/apply-for-legal-aid/templates/_envs.tpl
+++ b/helm_deploy/apply-for-legal-aid/templates/_envs.tpl
@@ -220,6 +220,17 @@ env:
       secretKeyRef:
         name: {{ template "apply-for-legal-aid.fullname" . }}
         key: sidekiqWebUiPassword
+  {{ if .Values.redis.enabled }}
+  - name: REDIS_PROTOCOL
+    value: "redis"
+  - name: REDIS_HOST
+    value: {{ template "apply-for-legal-aid.redis-uat-host" . }}
+  - name: REDIS_PASSWORD
+    valueFrom:
+      secretKeyRef:
+        name: {{ template "apply-for-legal-aid.fullname" . }}
+        key: redisPassword
+  {{ else }}
   - name: REDIS_HOST
     valueFrom:
       secretKeyRef:
@@ -230,6 +241,7 @@ env:
       secretKeyRef:
         name: apply-for-legal-aid-elasticache-instance-output
         key: auth_token
+  {{ end }}
   - name: S3_BUCKET
     valueFrom:
       secretKeyRef:
diff --git a/helm_deploy/apply-for-legal-aid/templates/_helpers.tpl b/helm_deploy/apply-for-legal-aid/templates/_helpers.tpl
index b1c148aee2..4aa29b957e 100644
--- a/helm_deploy/apply-for-legal-aid/templates/_helpers.tpl
+++ b/helm_deploy/apply-for-legal-aid/templates/_helpers.tpl
@@ -46,3 +46,20 @@ https://pauladamsmith.com/blog/2011/05/go_time.html
     {{ "* * * * *" }}
   {{- end -}}
 {{- end -}}
+
+{{/*
+Function to return the name for a UAT redis chart master node host
+This duplicates bitnami/redis chart's internal logic whereby
+If branch name contains "redis" then the redis-release-name appends "-master", otherwise it appends "-redis-master"
+*/}}
+{{- define "apply-for-legal-aid.redis-uat-host" -}}
+  {{- $redis_chart_name := "redis" -}}
+
+  {{- if contains $redis_chart_name .Release.Name -}}
+    {{- $redis_release_name := (.Release.Name | trunc 63 | trimSuffix "-") -}}
+    {{- printf "%s-master.%s.svc.cluster.local" $redis_release_name .Release.Namespace -}}
+  {{- else -}}
+    {{- $redis_release_name := (printf "%s-%s" .Release.Name $redis_chart_name | trunc 63 | trimSuffix "-") -}}
+    {{- printf "%s-master.%s.svc.cluster.local" $redis_release_name .Release.Namespace -}}
+  {{- end -}}
+{{- end -}}
diff --git a/helm_deploy/apply-for-legal-aid/templates/deployment_drainer.yaml b/helm_deploy/apply-for-legal-aid/templates/deployment_drainer.yaml
new file mode 100644
index 0000000000..6ec124a944
--- /dev/null
+++ b/helm_deploy/apply-for-legal-aid/templates/deployment_drainer.yaml
@@ -0,0 +1,59 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "apply-for-legal-aid.fullname" . }}-drainer
+  labels:
+    app: {{ template "apply-for-legal-aid.name" . }}
+    chart: {{ template "apply-for-legal-aid.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.worker.replicaCount }}
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 0
+      maxSurge: 100%
+  selector:
+    matchLabels:
+      app: {{ template "apply-for-legal-aid.name" . }}-drainer
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "apply-for-legal-aid.name" . }}-drainer
+        release: {{ .Release.Name }}
+    spec:
+      serviceAccountName: "{{ .Values.service_account.name }}"
+      containers:
+        - name: drainer
+          image: '{{ .Values.image.repository }}:{{ .Values.image.tag }}'
+          imagePullPolicy: IfNotPresent
+          command: ['bundle', 'exec', 'sidekiq']
+{{ include "apply-for-legal-aid.envs" . | nindent 10 }}
+            - name: NAMEPSPACED_SIDEKIQ_DRAINER
+              value: "true"
+          resources:
+            limits:
+              cpu: 500m
+              memory: 1Gi
+            requests:
+              cpu: 10m
+              memory: 512Mi
+          ports:
+            - containerPort: 7433
+          livenessProbe:
+            exec:
+              command: ['bin/sidekiq_health_check']
+            initialDelaySeconds: 60
+            timeoutSeconds: 5
+          readinessProbe:
+            exec:
+              command: ['bin/sidekiq_health_check']
+            initialDelaySeconds: 60
+            timeoutSeconds: 5
+          lifecycle:
+            preStop:
+              exec:
+                command: ['bundle', 'exec', 'sidekiqctl', 'quiet']
+      terminationGracePeriodSeconds: 60
diff --git a/helm_deploy/apply-for-legal-aid/templates/secret.yaml b/helm_deploy/apply-for-legal-aid/templates/secret.yaml
index b501b2ab08..89b297935e 100644
--- a/helm_deploy/apply-for-legal-aid/templates/secret.yaml
+++ b/helm_deploy/apply-for-legal-aid/templates/secret.yaml
@@ -11,6 +11,9 @@ data:
   postgresqlUsername: {{ .Values.postgresql.postgresqlUsername | b64enc | quote }}
   postgresqlPassword: {{ .Values.postgresql.auth.postgresPassword | b64enc | quote }}
   {{ end }}
+  {{if .Values.redis.enabled }}
+  redisPassword: {{ .Values.redis.auth.password | b64enc | quote }}
+  {{ end }}
   sentryDsn: {{ .Values.sentry.dsn | b64enc | quote }}
   govukNotifyApiKey: {{ .Values.govuk_notify.api_key | b64enc | quote }}
   ordnanceSurveyApiKey: {{ .Values.ordnance_survey.api_key | b64enc | quote }}
diff --git a/helm_deploy/apply-for-legal-aid/values-production.yaml b/helm_deploy/apply-for-legal-aid/values-production.yaml
index f42c076bf5..5e81c6ccc5 100644
Binary files a/helm_deploy/apply-for-legal-aid/values-production.yaml and b/helm_deploy/apply-for-legal-aid/values-production.yaml differ
diff --git a/helm_deploy/apply-for-legal-aid/values-staging.yaml b/helm_deploy/apply-for-legal-aid/values-staging.yaml
index 175c486093..366ef50864 100644
Binary files a/helm_deploy/apply-for-legal-aid/values-staging.yaml and b/helm_deploy/apply-for-legal-aid/values-staging.yaml differ
diff --git a/helm_deploy/apply-for-legal-aid/values-uat.yaml b/helm_deploy/apply-for-legal-aid/values-uat.yaml
index 50efcca79b..2f81e508e5 100644
Binary files a/helm_deploy/apply-for-legal-aid/values-uat.yaml and b/helm_deploy/apply-for-legal-aid/values-uat.yaml differ