diff --git a/app/controllers/locations_controller.rb b/app/controllers/locations_controller.rb
index bf812e990..4677488f1 100644
--- a/app/controllers/locations_controller.rb
+++ b/app/controllers/locations_controller.rb
@@ -48,8 +48,17 @@ class LocationsController < ApplicationController
   end
 
   def deactivate
-    if @location.location_deactivation_periods.create!(deactivation_date: params[:deactivation_date]) && reset_location_and_scheme_for_logs!
+    if @location.location_deactivation_periods.create!(deactivation_date: params[:deactivation_date])
+      logs = reset_location_and_scheme_for_logs!
+
       flash[:notice] = deactivate_success_notice
+      logs.group_by(&:created_by).transform_values(&:count).compact.each do |user, count|
+        LocationOrSchemeDeactivationMailer.send_deactivation_mail(user,
+                                                                  count,
+                                                                  url_for(controller: "lettings_logs", action: "update_logs"),
+                                                                  @location.scheme.service_name,
+                                                                  @location.postcode).deliver_later
+      end
     end
     redirect_to scheme_location_path(@scheme, @location)
   end
@@ -219,7 +228,9 @@ private
   end
 
   def reset_location_and_scheme_for_logs!
-    @location.lettings_logs.filter_by_before_startdate(params[:deactivation_date].to_time).update!(location: nil, scheme: nil, unresolved: true)
+    logs = @location.lettings_logs.filter_by_before_startdate(params[:deactivation_date].to_time)
+    logs.update!(location: nil, scheme: nil, unresolved: true)
+    logs
   end
 
   def toggle_date(key)
diff --git a/app/controllers/schemes_controller.rb b/app/controllers/schemes_controller.rb
index 477c5d143..bfa7073d6 100644
--- a/app/controllers/schemes_controller.rb
+++ b/app/controllers/schemes_controller.rb
@@ -49,8 +49,16 @@ class SchemesController < ApplicationController
   end
 
   def deactivate
-    if @scheme.scheme_deactivation_periods.create!(deactivation_date: params[:deactivation_date]) && reset_location_and_scheme_for_logs!
+    if @scheme.scheme_deactivation_periods.create!(deactivation_date: params[:deactivation_date])
+      logs = reset_location_and_scheme_for_logs!
+
       flash[:notice] = deactivate_success_notice
+      logs.group_by(&:created_by).transform_values(&:count).compact.each do |user, count|
+        LocationOrSchemeDeactivationMailer.send_deactivation_mail(user,
+                                                                  count,
+                                                                  url_for(controller: "lettings_logs", action: "update_logs"),
+                                                                  @scheme.service_name).deliver_later
+      end
     end
     redirect_to scheme_details_path(@scheme)
   end
@@ -349,6 +357,8 @@ private
   end
 
   def reset_location_and_scheme_for_logs!
-    @scheme.lettings_logs.filter_by_before_startdate(params[:deactivation_date].to_time).update!(location: nil, scheme: nil, unresolved: true)
+    logs = @scheme.lettings_logs.filter_by_before_startdate(params[:deactivation_date].to_time)
+    logs.update!(location: nil, scheme: nil, unresolved: true)
+    logs
   end
 end
diff --git a/app/mailers/location_or_scheme_deactivation_mailer.rb b/app/mailers/location_or_scheme_deactivation_mailer.rb
new file mode 100644
index 000000000..b6e8f704f
--- /dev/null
+++ b/app/mailers/location_or_scheme_deactivation_mailer.rb
@@ -0,0 +1,26 @@
+class LocationOrSchemeDeactivationMailer < NotifyMailer
+  DEACTIVATION_TEMPLATE_ID = "8d07a8c3-a4e3-4102-8be7-4ee79e4183fd".freeze
+
+  def send_deactivation_mail(user, log_count, update_logs_url, scheme_name, postcode = nil)
+    send_email(
+      user.email,
+      DEACTIVATION_TEMPLATE_ID,
+      {
+        log_count:,
+        log_or_logs: log_count == 1 ? "log" : "logs",
+        update_logs_url:,
+        location_or_scheme_description: description(scheme_name, postcode),
+      },
+    )
+  end
+
+private
+
+  def description(scheme_name, postcode)
+    if postcode
+      "the #{postcode} location from the #{scheme_name} scheme"
+    else
+      "the #{scheme_name} scheme"
+    end
+  end
+end
diff --git a/app/mailers/notify_mailer.rb b/app/mailers/notify_mailer.rb
index 506df5818..21a6e0270 100644
--- a/app/mailers/notify_mailer.rb
+++ b/app/mailers/notify_mailer.rb
@@ -1,4 +1,4 @@
-class NotifyMailer
+class NotifyMailer < ApplicationMailer
   require "notifications/client"
 
   def notify_client
diff --git a/spec/mailers/location_or_scheme_deactivation_mailer_spec.rb b/spec/mailers/location_or_scheme_deactivation_mailer_spec.rb
new file mode 100644
index 000000000..49c515be8
--- /dev/null
+++ b/spec/mailers/location_or_scheme_deactivation_mailer_spec.rb
@@ -0,0 +1,73 @@
+require "rails_helper"
+
+RSpec.describe LocationOrSchemeDeactivationMailer do
+  let(:notify_client) { instance_double(Notifications::Client) }
+
+  before do
+    allow(Notifications::Client).to receive(:new).and_return(notify_client)
+    allow(notify_client).to receive(:send_email).and_return(true)
+  end
+
+  describe "#send_deactivation_mail" do
+    let(:user) { FactoryBot.create(:user, email: "user@example.com") }
+
+    it "sends a deactivation E-mail via notify" do
+      update_logs_url = :update_logs_url
+
+      expect(notify_client).to receive(:send_email).with(hash_including({
+        email_address: user.email,
+        template_id: described_class::DEACTIVATION_TEMPLATE_ID,
+        personalisation: hash_including({ update_logs_url: }),
+      }))
+
+      described_class.new.send_deactivation_mail(user, 3, update_logs_url, "Test Scheme Name", "test postcode")
+    end
+
+    it "singularises 'logs' correctly" do
+      expect(notify_client).to receive(:send_email).with(hash_including({
+        personalisation: hash_including({
+          log_count: 1,
+          log_or_logs: "log",
+        }),
+      }))
+
+      described_class.new.send_deactivation_mail(user, 1, :update_logs_url, :scheme_name)
+    end
+
+    it "pluralises 'logs' correctly" do
+      expect(notify_client).to receive(:send_email).with(hash_including({
+        personalisation: hash_including({
+          log_count: 2,
+          log_or_logs: "logs",
+        }),
+      }))
+
+      described_class.new.send_deactivation_mail(user, 2, :update_logs_url, :scheme_name)
+    end
+
+    it "describes a scheme" do
+      scheme_name = "Test Scheme"
+
+      expect(notify_client).to receive(:send_email).with(hash_including({
+        personalisation: hash_including({
+          location_or_scheme_description: "the #{scheme_name} scheme",
+        }),
+      }))
+
+      described_class.new.send_deactivation_mail(user, 3, :update_logs_url, scheme_name)
+    end
+
+    it "describes a location within a scheme" do
+      scheme_name = "Test Scheme"
+      postcode = "test postcode"
+
+      expect(notify_client).to receive(:send_email).with(hash_including({
+        personalisation: hash_including({
+          location_or_scheme_description: "the #{postcode} location from the #{scheme_name} scheme",
+        }),
+      }))
+
+      described_class.new.send_deactivation_mail(user, 3, :update_logs_url, scheme_name, postcode)
+    end
+  end
+end
diff --git a/spec/requests/locations_controller_spec.rb b/spec/requests/locations_controller_spec.rb
index f17ef604a..e870fe4ff 100644
--- a/spec/requests/locations_controller_spec.rb
+++ b/spec/requests/locations_controller_spec.rb
@@ -1336,27 +1336,37 @@ RSpec.describe LocationsController, type: :request do
 
       context "when confirming deactivation" do
         let(:params) { { deactivation_date:, confirm: true, deactivation_date_type: "other" } }
+        let(:mailer) { instance_double(LocationOrSchemeDeactivationMailer) }
+
+        let(:user_a) { FactoryBot.create(:user, email: "user_a@example.com") }
+        let(:user_b) { FactoryBot.create(:user, email: "user_b@example.com") }
 
         before do
+          FactoryBot.create_list(:lettings_log, 1, :sh, location:, scheme:, startdate:, created_by: user_a)
+          FactoryBot.create_list(:lettings_log, 3, :sh, location:, scheme:, startdate:, created_by: user_b)
+
           Timecop.freeze(Time.utc(2022, 10, 10))
           sign_in user
-          patch "/schemes/#{scheme.id}/locations/#{location.id}/deactivate", params:
         end
 
         after do
           Timecop.unfreeze
         end
 
-        it "updates existing location with valid deactivation date and renders location page" do
-          follow_redirect!
-          expect(response).to have_http_status(:ok)
-          expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
-          location.reload
-          expect(location.location_deactivation_periods.count).to eq(1)
-          expect(location.location_deactivation_periods.first.deactivation_date).to eq(deactivation_date)
-        end
-
         context "and a log startdate is after location deactivation date" do
+          before do
+            patch "/schemes/#{scheme.id}/locations/#{location.id}/deactivate", params:
+          end
+
+          it "updates existing location with valid deactivation date and renders location page" do
+            follow_redirect!
+            expect(response).to have_http_status(:ok)
+            expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
+            location.reload
+            expect(location.location_deactivation_periods.count).to eq(1)
+            expect(location.location_deactivation_periods.first.deactivation_date).to eq(deactivation_date)
+          end
+
           it "clears the location and scheme answers" do
             expect(lettings_log.location).to eq(location)
             expect(lettings_log.scheme).to eq(scheme)
@@ -1372,6 +1382,14 @@ RSpec.describe LocationsController, type: :request do
           end
         end
 
+        context "and the users need to be notified" do
+          it "sends E-mails to the creators of affected logs with counts" do
+            expect {
+              patch "/schemes/#{scheme.id}/locations/#{location.id}/deactivate", params:
+            }.to enqueue_job(ActionMailer::MailDeliveryJob).at_least(2).times
+          end
+        end
+
         context "and a log startdate is before location deactivation date" do
           let(:startdate) { Time.utc(2022, 10, 9) }
 
diff --git a/spec/requests/schemes_controller_spec.rb b/spec/requests/schemes_controller_spec.rb
index 0a75e4fcd..3624313eb 100644
--- a/spec/requests/schemes_controller_spec.rb
+++ b/spec/requests/schemes_controller_spec.rb
@@ -1792,7 +1792,7 @@ RSpec.describe SchemesController, type: :request do
       let!(:scheme) { FactoryBot.create(:scheme, owning_organisation: user.organisation, created_at: Time.zone.today) }
       let!(:location) { FactoryBot.create(:location, scheme:) }
       let(:deactivation_date) { Time.utc(2022, 10, 10) }
-      let!(:lettings_log) { FactoryBot.create(:lettings_log, :sh, location:, scheme:, startdate:, owning_organisation: user.organisation) }
+      let!(:lettings_log) { FactoryBot.create(:lettings_log, :sh, location:, scheme:, startdate:, owning_organisation: user.organisation, created_by: user) }
       let(:startdate) { Time.utc(2022, 10, 11) }
       let(:setup_schemes) { nil }
 
@@ -1863,28 +1863,32 @@ RSpec.describe SchemesController, type: :request do
 
       context "when confirming deactivation" do
         let(:params) { { deactivation_date:, confirm: true, deactivation_date_type: "other" } }
+        let(:mailer) { instance_double(LocationOrSchemeDeactivationMailer) }
 
         before do
           Timecop.freeze(Time.utc(2022, 10, 10))
           sign_in user
-          patch "/schemes/#{scheme.id}/deactivate", params:
         end
 
         after do
           Timecop.unfreeze
         end
 
-        it "updates existing scheme with valid deactivation date and renders scheme page" do
-          follow_redirect!
-          follow_redirect!
-          expect(response).to have_http_status(:ok)
-          expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
-          scheme.reload
-          expect(scheme.scheme_deactivation_periods.count).to eq(1)
-          expect(scheme.scheme_deactivation_periods.first.deactivation_date).to eq(deactivation_date)
-        end
-
         context "and a log startdate is after scheme deactivation date" do
+          before do
+            patch "/schemes/#{scheme.id}/deactivate", params:
+          end
+
+          it "updates existing scheme with valid deactivation date and renders scheme page" do
+            follow_redirect!
+            follow_redirect!
+            expect(response).to have_http_status(:ok)
+            expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
+            scheme.reload
+            expect(scheme.scheme_deactivation_periods.count).to eq(1)
+            expect(scheme.scheme_deactivation_periods.first.deactivation_date).to eq(deactivation_date)
+          end
+
           it "clears the scheme and scheme answers" do
             expect(lettings_log.scheme).to eq(scheme)
             expect(lettings_log.scheme).to eq(scheme)
@@ -1917,6 +1921,14 @@ RSpec.describe SchemesController, type: :request do
             expect(lettings_log.unresolved).to eq(nil)
           end
         end
+
+        context "and the users need to be notified" do
+          it "sends E-mails to the creators of affected logs with counts" do
+            expect {
+              patch "/schemes/#{scheme.id}/deactivate", params:
+            }.to enqueue_job(ActionMailer::MailDeliveryJob)
+          end
+        end
       end
 
       context "when the date is not selected" do