diff --git a/app/mailers/bulk_upload_mailer.rb b/app/mailers/bulk_upload_mailer.rb
index e0115abb0..7c62f71a1 100644
--- a/app/mailers/bulk_upload_mailer.rb
+++ b/app/mailers/bulk_upload_mailer.rb
@@ -3,6 +3,7 @@ class BulkUploadMailer < NotifyMailer
 
   COMPLETE_TEMPLATE_ID = "83279578-c890-4168-838b-33c9cf0dc9f0".freeze
   FAILED_CSV_ERRORS_TEMPLATE_ID = "e27abcd4-5295-48c2-b127-e9ee4b781b75".freeze
+  FAILED_CSV_DUPLICATE_ERRORS_TEMPLATE_ID = "931d5bda-a08f-4de6-a455-38a63bff1956".freeze
   FAILED_FILE_SETUP_ERROR_TEMPLATE_ID = "24c9f4c7-96ad-470a-ba31-eb51b7cbafd9".freeze
   FAILED_SERVICE_ERROR_TEMPLATE_ID = "c3f6288c-7a74-4e77-99ee-6c4a0f6e125a".freeze
   HOW_TO_FIX_UPLOAD_TEMPLATE_ID = "21a07b26-f625-4846-9f4d-39e30937aa24".freeze
@@ -95,6 +96,26 @@ class BulkUploadMailer < NotifyMailer
     )
   end
 
+  def send_correct_duplicates_and_upload_again_mail(bulk_upload:)
+    summary_report_link = if BulkUploadErrorSummaryTableComponent.new(bulk_upload:).errors?
+                            bulk_upload.sales? ? summary_bulk_upload_sales_result_url(bulk_upload) : summary_bulk_upload_lettings_result_url(bulk_upload)
+                          else
+                            bulk_upload.sales? ? bulk_upload_sales_result_url(bulk_upload) : bulk_upload_lettings_result_url(bulk_upload)
+                          end
+
+    send_email(
+      bulk_upload.user.email,
+      FAILED_CSV_DUPLICATE_ERRORS_TEMPLATE_ID,
+      {
+        filename: bulk_upload.filename,
+        upload_timestamp: bulk_upload.created_at.to_fs(:govuk_date_and_time),
+        year_combo: bulk_upload.year_combo,
+        lettings_or_sales: bulk_upload.log_type,
+        summary_report_link:,
+      },
+    )
+  end
+
   def send_bulk_upload_failed_file_setup_error_mail(bulk_upload:)
     bulk_upload_link = if BulkUploadErrorSummaryTableComponent.new(bulk_upload:).errors?
                          bulk_upload.sales? ? summary_bulk_upload_sales_result_url(bulk_upload) : summary_bulk_upload_lettings_result_url(bulk_upload)
diff --git a/app/services/bulk_upload/lettings/validator.rb b/app/services/bulk_upload/lettings/validator.rb
index 116c3b745..291bf45e7 100644
--- a/app/services/bulk_upload/lettings/validator.rb
+++ b/app/services/bulk_upload/lettings/validator.rb
@@ -40,29 +40,25 @@ class BulkUpload::Lettings::Validator
     end
   end
 
-  def create_logs?
-    return false if any_setup_errors?
+  def block_log_creation_reason
+    return "setup_errors" if any_setup_errors?
 
     if row_parsers.any?(&:block_log_creation?)
       Sentry.capture_message("Bulk upload log creation blocked: #{bulk_upload.id}.")
-      return false
+      return "row_parser_block_log_creation"
     end
 
     if any_logs_already_exist? && FeatureToggle.bulk_upload_duplicate_log_check_enabled?
-      Sentry.capture_message("Bulk upload log creation blocked due to duplicate logs: #{bulk_upload.id}.")
-      return false
+      return "duplicate_logs"
     end
 
     row_parsers.each do |row_parser|
       row_parser.log.blank_invalid_non_setup_fields!
     end
-
     if any_logs_invalid?
       Sentry.capture_message("Bulk upload log creation blocked due to invalid logs after blanking non setup fields: #{bulk_upload.id}.")
-      return false
+      "logs_invalid"
     end
-
-    true
   end
 
   def self.question_for_field(field)
diff --git a/app/services/bulk_upload/processor.rb b/app/services/bulk_upload/processor.rb
index 38f67ede4..c54032fda 100644
--- a/app/services/bulk_upload/processor.rb
+++ b/app/services/bulk_upload/processor.rb
@@ -36,20 +36,28 @@ class BulkUpload::Processor
 
     if validator.any_setup_errors?
       send_setup_errors_mail
-
-    elsif validator.create_logs?
-      create_logs
-
-      if validator.soft_validation_errors_only?
-        send_check_soft_validations_mail
-      elsif created_logs_but_incompleted?
-        send_how_to_fix_upload_mail
-      elsif created_logs_and_all_completed?
-        bulk_upload.unpend
-        send_success_mail
-      end
     else
-      send_correct_and_upload_again_mail # summary/full report
+      block_creation_reason = validator.block_log_creation_reason
+
+      if block_creation_reason.present?
+        case block_creation_reason
+        when "duplicate_logs"
+          send_correct_duplicates_and_upload_again_mail
+        else
+          send_correct_and_upload_again_mail # summary/full report
+        end
+      else
+        create_logs
+
+        if validator.soft_validation_errors_only?
+          send_check_soft_validations_mail
+        elsif created_logs_but_incompleted?
+          send_how_to_fix_upload_mail
+        elsif created_logs_and_all_completed?
+          bulk_upload.unpend
+          send_success_mail
+        end
+      end
     end
   rescue StandardError => e
     Sentry.capture_exception(e)
@@ -97,6 +105,12 @@ private
       .deliver_later
   end
 
+  def send_correct_duplicates_and_upload_again_mail
+    BulkUploadMailer
+      .send_correct_duplicates_and_upload_again_mail(bulk_upload:)
+      .deliver_later
+  end
+
   def send_success_mail
     BulkUploadMailer
       .send_bulk_upload_complete_mail(user:, bulk_upload:)
diff --git a/app/services/bulk_upload/sales/validator.rb b/app/services/bulk_upload/sales/validator.rb
index 76fb6f1ae..7ad9638d7 100644
--- a/app/services/bulk_upload/sales/validator.rb
+++ b/app/services/bulk_upload/sales/validator.rb
@@ -39,17 +39,17 @@ class BulkUpload::Sales::Validator
     end
   end
 
-  def create_logs?
-    return false if any_setup_errors?
+  def block_log_creation_reason
+    return "setup_errors" if any_setup_errors?
 
     if row_parsers.any?(&:block_log_creation?)
       Sentry.capture_message("Bulk upload log creation blocked: #{bulk_upload.id}.")
-      return false
+      return "row_parser_block_log_creation"
     end
 
     if any_logs_already_exist? && FeatureToggle.bulk_upload_duplicate_log_check_enabled?
       Sentry.capture_message("Bulk upload log creation blocked due to duplicate logs: #{bulk_upload.id}.")
-      return false
+      return "duplicate_logs"
     end
 
     row_parsers.each do |row_parser|
@@ -58,10 +58,8 @@ class BulkUpload::Sales::Validator
 
     if any_logs_invalid?
       Sentry.capture_message("Bulk upload log creation blocked due to invalid logs after blanking non setup fields: #{bulk_upload.id}.")
-      return false
+      "logs_invalid"
     end
-
-    true
   end
 
   def any_setup_errors?
diff --git a/spec/mailers/bulk_upload_mailer_spec.rb b/spec/mailers/bulk_upload_mailer_spec.rb
index c3225c937..910bca4a9 100644
--- a/spec/mailers/bulk_upload_mailer_spec.rb
+++ b/spec/mailers/bulk_upload_mailer_spec.rb
@@ -121,4 +121,29 @@ RSpec.describe BulkUploadMailer do
       mailer.send_check_soft_validations_mail(bulk_upload:)
     end
   end
+
+  describe "#send_correct_duplicates_and_upload_again_mail" do
+    context "when 2 columns with errors" do
+      before do
+        create(:bulk_upload_error, bulk_upload:, col: "A")
+        create(:bulk_upload_error, bulk_upload:, col: "B")
+      end
+
+      it "sends correctly formed email" do
+        expect(notify_client).to receive(:send_email).with(
+          email_address: user.email,
+          template_id: described_class::FAILED_CSV_DUPLICATE_ERRORS_TEMPLATE_ID,
+          personalisation: {
+            filename: bulk_upload.filename,
+            upload_timestamp: bulk_upload.created_at.to_fs(:govuk_date_and_time),
+            year_combo: bulk_upload.year_combo,
+            lettings_or_sales: bulk_upload.log_type,
+            summary_report_link: "http://localhost:3000/lettings-logs/bulk-upload-results/#{bulk_upload.id}",
+          },
+        )
+
+        mailer.send_correct_duplicates_and_upload_again_mail(bulk_upload:)
+      end
+    end
+  end
 end
diff --git a/spec/services/bulk_upload/lettings/validator_spec.rb b/spec/services/bulk_upload/lettings/validator_spec.rb
index 897010de6..60eb8a955 100644
--- a/spec/services/bulk_upload/lettings/validator_spec.rb
+++ b/spec/services/bulk_upload/lettings/validator_spec.rb
@@ -232,7 +232,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
     end
   end
 
-  describe "#create_logs?" do
+  describe "#block_log_creation_reason" do
     context "when a log has a clearable, non-setup error" do
       let(:log_1) { build(:lettings_log, :completed, period: 2, assigned_to: user) }
       let(:log_2) { build(:lettings_log, :completed, period: 2, assigned_to: user, age1: 5) }
@@ -245,7 +245,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
 
       it "returns false" do
         validator.call
-        expect(validator).to be_create_logs
+        expect(validator.block_log_creation_reason).to be_nil
       end
     end
 
@@ -261,7 +261,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
 
       it "returns true" do
         validator.call
-        expect(validator).to be_create_logs
+        expect(validator.block_log_creation_reason).to be_nil
       end
     end
 
@@ -277,7 +277,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
 
       it "will not create logs" do
         validator.call
-        expect(validator).not_to be_create_logs
+        expect(validator.block_log_creation_reason).to eq("setup_errors")
       end
     end
 
@@ -291,7 +291,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
 
       it "returns false" do
         validator.call
-        expect(validator).not_to be_create_logs
+        expect(validator.block_log_creation_reason).to eq("setup_errors")
       end
     end
   end
diff --git a/spec/services/bulk_upload/processor_spec.rb b/spec/services/bulk_upload/processor_spec.rb
index de0ed2dba..0368635e7 100644
--- a/spec/services/bulk_upload/processor_spec.rb
+++ b/spec/services/bulk_upload/processor_spec.rb
@@ -14,7 +14,7 @@ RSpec.describe BulkUpload::Processor do
       call: nil,
       total_logs_count: 1,
       any_setup_errors?: false,
-      create_logs?: true,
+      block_log_creation_reason: nil,
       soft_validation_errors_only?: false,
     )
   end
@@ -165,7 +165,7 @@ RSpec.describe BulkUpload::Processor do
       let(:log) { build(:lettings_log, :setup_completed, assigned_to: user) }
 
       before do
-        allow(mock_validator).to receive(:create_logs?).and_return(true)
+        allow(mock_validator).to receive(:block_log_creation_reason).and_return(nil)
         allow(mock_validator).to receive(:soft_validation_errors_only?).and_return(false)
         allow(FeatureToggle).to receive(:bulk_upload_duplicate_log_check_enabled?).and_return(true)
       end
@@ -198,7 +198,7 @@ RSpec.describe BulkUpload::Processor do
 
     context "when a bulk upload has logs with only soft validations triggered" do
       before do
-        allow(mock_validator).to receive(:create_logs?).and_return(true)
+        allow(mock_validator).to receive(:block_log_creation_reason).and_return(nil)
         allow(mock_validator).to receive(:soft_validation_errors_only?).and_return(true)
         allow(FeatureToggle).to receive(:bulk_upload_duplicate_log_check_enabled?).and_return(true)
       end
@@ -239,7 +239,7 @@ RSpec.describe BulkUpload::Processor do
           call: nil,
           total_logs_count: 1,
           any_setup_errors?: false,
-          create_logs?: false,
+          block_log_creation_reason: "row_parser_block_log_creation",
         )
       end
 
@@ -254,6 +254,30 @@ RSpec.describe BulkUpload::Processor do
         expect(mail_double).to have_received(:deliver_later)
       end
     end
+
+    context "when upload has duplicate logs blocking log creation" do
+      let(:mock_validator) do
+        instance_double(
+          BulkUpload::Lettings::Validator,
+          invalid?: false,
+          call: nil,
+          total_logs_count: 1,
+          any_setup_errors?: false,
+          block_log_creation_reason: "duplicate_logs",
+        )
+      end
+
+      it "sends correct_and_upload_again_mail" do
+        mail_double = instance_double("ActionMailer::MessageDelivery", deliver_later: nil)
+
+        allow(BulkUploadMailer).to receive(:send_correct_duplicates_and_upload_again_mail).and_return(mail_double)
+
+        processor.call
+
+        expect(BulkUploadMailer).to have_received(:send_correct_duplicates_and_upload_again_mail)
+        expect(mail_double).to have_received(:deliver_later)
+      end
+    end
   end
 
   describe "#approve" do
diff --git a/spec/services/bulk_upload/sales/validator_spec.rb b/spec/services/bulk_upload/sales/validator_spec.rb
index c275ce681..968014e7c 100644
--- a/spec/services/bulk_upload/sales/validator_spec.rb
+++ b/spec/services/bulk_upload/sales/validator_spec.rb
@@ -204,7 +204,7 @@ RSpec.describe BulkUpload::Sales::Validator do
     end
   end
 
-  describe "#create_logs?" do
+  describe "#block_log_creation_reason" do
     context "when all logs are valid" do
       let(:log_1) { build(:sales_log, :completed, assigned_to: user) }
       let(:log_2) { build(:sales_log, :completed, assigned_to: user) }
@@ -214,9 +214,9 @@ RSpec.describe BulkUpload::Sales::Validator do
         file.write(BulkUpload::SalesLogToCsv.new(log: log_2).to_csv_row)
       end
 
-      it "returns truthy" do
+      it "returns nil" do
         validator.call
-        expect(validator).to be_create_logs
+        expect(validator.block_log_creation_reason).to be_nil
       end
     end
 
@@ -229,9 +229,9 @@ RSpec.describe BulkUpload::Sales::Validator do
         file.write(BulkUpload::SalesLogToCsv.new(log: log_2).to_csv_row)
       end
 
-      it "returns truthy" do
+      it "returns nil" do
         validator.call
-        expect(validator).to be_create_logs
+        expect(validator.block_log_creation_reason).to be_nil
       end
     end
 
@@ -245,9 +245,9 @@ RSpec.describe BulkUpload::Sales::Validator do
         file.close
       end
 
-      it "returns false" do
+      it "returns the reason" do
         validator.call
-        expect(validator).not_to be_create_logs
+        expect(validator.block_log_creation_reason).to eq("setup_errors")
       end
     end
 
@@ -262,7 +262,7 @@ RSpec.describe BulkUpload::Sales::Validator do
 
       it "will not create logs" do
         validator.call
-        expect(validator).not_to be_create_logs
+        expect(validator.block_log_creation_reason).to eq("setup_errors")
       end
     end
   end