diff --git a/app/models/lettings_log.rb b/app/models/lettings_log.rb
index 3d01c5284..45d13a792 100644
--- a/app/models/lettings_log.rb
+++ b/app/models/lettings_log.rb
@@ -572,6 +572,14 @@ class LettingsLog < Log
     is_general_needs? && referral == 4
   end
 
+  def has_any_person_details?(person_index)
+    ["sex#{person_index}", "relat#{person_index}", "ecstat#{person_index}"].any? { |field| public_send(field).present? } || public_send("age#{person_index}_known") == 1
+  end
+
+  def details_not_known_for_person?(person_index)
+    public_send("details_known_#{person_index}") == 1
+  end
+
 private
 
   def reset_invalid_unresolved_log_fields!
diff --git a/app/services/imports/lettings_logs_field_import_service.rb b/app/services/imports/lettings_logs_field_import_service.rb
index d63cc3354..75acef8fd 100644
--- a/app/services/imports/lettings_logs_field_import_service.rb
+++ b/app/services/imports/lettings_logs_field_import_service.rb
@@ -24,6 +24,8 @@ module Imports
         import_from(folder, :update_sex_and_relat)
       when "general_needs_referral"
         import_from(folder, :update_general_needs_referral)
+      when "person_details"
+        import_from(folder, :update_person_details)
       else
         raise "Updating #{field} is not supported by the field import service"
       end
@@ -265,7 +267,7 @@ module Imports
 
       (2..record.hhmemb).each do |i|
         next @logger.info("lettings log #{record.id} has values for sex#{i} and relat#{i}, skipping update") if record["sex#{i}"] && record["relat#{i}"]
-        next @logger.info("lettings log #{record.id} has value 'no' for details_known_#{i}, skipping update") if record["details_known_#{i}"] == 1
+        next @logger.info("lettings log #{record.id} has value 'no' for details_known_#{i}, skipping update") if record.details_not_known_for_person?(i)
 
         if record["sex#{i}"].blank?
           record["sex#{i}"] = sex(xml_doc, i)
@@ -299,5 +301,113 @@ module Imports
       record.update!(referral: 4, referral_value_check: 0, values_updated_at: Time.zone.now)
       @logger.info("lettings log #{record.id}'s referral value has been set to 4")
     end
+
+    def update_person_details(xml_doc)
+      return if meta_field_value(xml_doc, "form-name").include?("Sales")
+
+      old_id = meta_field_value(xml_doc, "document-id")
+      record = LettingsLog.find_by(old_id:)
+
+      return @logger.warn("lettings log with old id #{old_id} not found") unless record
+      return @logger.info("lettings log #{record.id} has no hhmemb, skipping update") unless record.hhmemb
+
+      if (2..record.hhmemb).all? { |person_index| record.has_any_person_details?(person_index) || record.details_not_known_for_person?(person_index) }
+        return @logger.info("lettings log #{record.id} has all household member details, skipping update")
+      end
+      if record.hhmemb == 8 || ((record.hhmemb + 1)..8).none? { |person_index| file_contains_person_details?(xml_doc, person_index) }
+        return @logger.info("lettings log #{record.id} has no additional household member details, skipping update")
+      end
+
+      person_index = 2
+      next_person_index = person_index + 1
+
+      while person_exists_on_the_log?(record, person_index)
+        if person_exists_on_the_log?(record, next_person_index)
+          if record.has_any_person_details?(person_index) || record.details_not_known_for_person?(person_index)
+            @logger.info("lettings log #{record.id} has details for person #{person_index}, skipping person")
+            person_index += 1
+            next_person_index += 1
+            next
+          end
+
+          if !record.has_any_person_details?(next_person_index) && !record.details_not_known_for_person?(next_person_index)
+            next_person_index += 1
+            next
+          end
+
+          move_person_details(record, person_index, next_person_index)
+        else
+          reimport_person_details(record, xml_doc, person_index, next_person_index)
+        end
+
+        person_index += 1
+        next_person_index += 1
+      end
+
+      record.values_updated_at = Time.zone.now
+      record.save!
+    end
+
+    def age_known(xml_doc, person_index)
+      age_refused = string_or_nil(xml_doc, "P#{person_index}AR")
+      if age_refused.present?
+        if age_refused.casecmp?("AGE_REFUSED") || age_refused.casecmp?("No")
+          return 1 # No
+        else
+          return 0 # Yes
+        end
+      end
+      0
+    end
+
+    def details_known(index, record)
+      if record["age#{index}_known"] == 1 &&
+          record["sex#{index}"] == "R" &&
+          record["relat#{index}"] == "R" &&
+          record["ecstat#{index}"] == 10
+        1 # No
+      else
+        0 # Yes
+      end
+    end
+
+    def file_contains_person_details?(xml_doc, person_index)
+      safe_string_as_integer(xml_doc, "P#{person_index}Age").present? ||
+        string_or_nil(xml_doc, "P#{person_index}Sex").present? ||
+        unsafe_string_as_integer(xml_doc, "P#{person_index}Eco").present? ||
+        string_or_nil(xml_doc, "P#{person_index}Rel").present?
+    end
+
+    def move_person_details(record, person_index, next_person_index)
+      record["details_known_#{person_index}"] = record["details_known_#{next_person_index}"]
+      record["age#{person_index}"] = record["age#{next_person_index}"]
+      record["age#{person_index}_known"] = record["age#{next_person_index}_known"]
+      record["sex#{person_index}"] = record["sex#{next_person_index}"]
+      record["ecstat#{person_index}"] = record["ecstat#{next_person_index}"]
+      record["relat#{person_index}"] = record["relat#{next_person_index}"]
+
+      record["details_known_#{next_person_index}"] = nil
+      record["age#{next_person_index}"] = nil
+      record["age#{next_person_index}_known"] = nil
+      record["sex#{next_person_index}"] = nil
+      record["ecstat#{next_person_index}"] = nil
+      record["relat#{next_person_index}"] = nil
+
+      @logger.info("lettings log #{record.id}'s person #{next_person_index} details moved to person #{person_index} details")
+    end
+
+    def reimport_person_details(record, xml_doc, person_index, next_person_index)
+      record["age#{person_index}"] = safe_string_as_integer(xml_doc, "P#{next_person_index}Age")
+      record["age#{person_index}_known"] = age_known(xml_doc, next_person_index)
+      record["sex#{person_index}"] = sex(xml_doc, next_person_index)
+      record["ecstat#{person_index}"] = unsafe_string_as_integer(xml_doc, "P#{next_person_index}Eco")
+      record["relat#{person_index}"] = relat(xml_doc, next_person_index)
+      record["details_known_#{person_index}"] = details_known(person_index, record)
+      @logger.info("lettings log #{record.id}, reimported person #{person_index} details")
+    end
+
+    def person_exists_on_the_log?(record, person_index)
+      person_index <= record.hhmemb
+    end
   end
 end
diff --git a/lib/tasks/data_import_field.rake b/lib/tasks/data_import_field.rake
index f9879b4c6..3c3be4d2f 100644
--- a/lib/tasks/data_import_field.rake
+++ b/lib/tasks/data_import_field.rake
@@ -7,7 +7,7 @@ namespace :core do
 
     # We only allow a reduced list of known fields to be updatable
     case field
-    when "tenancycode", "major_repairs", "lettings_allocation", "offered", "address", "reason", "homeless", "created_by", "sex_and_relat", "general_needs_referral"
+    when "tenancycode", "major_repairs", "lettings_allocation", "offered", "address", "reason", "homeless", "created_by", "sex_and_relat", "general_needs_referral", "person_details"
       s3_service = Storage::S3Service.new(PlatformHelper.is_paas? ? Configuration::PaasConfigurationService.new : Configuration::EnvConfigurationService.new, ENV["IMPORT_PAAS_INSTANCE"])
       archive_io = s3_service.get_file_io(path)
       archive_service = Storage::ArchiveService.new(archive_io)
diff --git a/spec/lib/tasks/data_import_field_spec.rb b/spec/lib/tasks/data_import_field_spec.rb
index 6973e0762..b84cb9d23 100644
--- a/spec/lib/tasks/data_import_field_spec.rb
+++ b/spec/lib/tasks/data_import_field_spec.rb
@@ -164,6 +164,18 @@ describe "data_import_field imports" do
         end
       end
 
+      context "and we update the person_details field" do
+        let(:field) { "person_details" }
+
+        it "updates the 2023 logs from the given XML file" do
+          expect(Storage::S3Service).to receive(:new).with(paas_config_service, instance_name)
+          expect(storage_service).to receive(:get_file_io).with("spec/fixtures/imports/logs")
+          expect(Imports::LettingsLogsFieldImportService).to receive(:new).with(archive_service)
+          expect(import_service).to receive(:update_field).with(field, "logs")
+          task.invoke(field, fixture_path)
+        end
+      end
+
       it "raises an exception if no parameters are provided" do
         expect { task.invoke }.to raise_error(/Usage/)
       end
diff --git a/spec/services/imports/lettings_logs_field_import_service_spec.rb b/spec/services/imports/lettings_logs_field_import_service_spec.rb
index 9cc3ddfe5..7f7c8bf3c 100644
--- a/spec/services/imports/lettings_logs_field_import_service_spec.rb
+++ b/spec/services/imports/lettings_logs_field_import_service_spec.rb
@@ -1021,4 +1021,336 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
       end
     end
   end
+
+  context "when updating person_details" do
+    let(:field) { "person_details" }
+    let(:lettings_log) { LettingsLog.find_by(old_id: lettings_log_id) }
+
+    before do
+      Imports::LettingsLogsImportService.new(storage_service, logger).create_logs(fixture_directory)
+      lettings_log_file.rewind
+      lettings_log.update!(values_updated_at: nil)
+      lettings_log_xml.at_xpath("//xmlns:P4Age").content = 7
+      lettings_log_xml.at_xpath("//xmlns:P4Sex").content = "Male"
+      lettings_log_xml.at_xpath("//xmlns:P4Rel").content = "Child"
+      lettings_log_xml.at_xpath("//xmlns:P4Eco").content = "9) Child under 16"
+
+      lettings_log_xml.at_xpath("//xmlns:P7Age").content = 7
+      lettings_log_xml.at_xpath("//xmlns:P7Sex").content = "Male"
+      lettings_log_xml.at_xpath("//xmlns:P7Rel").content = "Child"
+      lettings_log_xml.at_xpath("//xmlns:P7Eco").content = "9) Child under 16"
+
+      lettings_log_xml.at_xpath("//xmlns:P8Age").content = 21
+    end
+
+    context "when the lettings log has no details for person 2" do
+      before do
+        lettings_log.update(details_known_2: 0, age2_known: nil, age2: nil, sex2: nil, ecstat2: nil, relat2: nil, hhmemb: 3,
+                            details_known_3: 0, age3_known: 0, age3: 19, sex3: "F", ecstat3: 10, relat3: "X")
+      end
+
+      it "moves the details of person 3 to person 2 and imports missing person 3 values" do
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 3 details moved to person 2 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 3 details/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.age2_known).to eq(0)
+        expect(lettings_log.age2).to eq(19)
+        expect(lettings_log.sex2).to eq("F")
+        expect(lettings_log.ecstat2).to eq(10)
+        expect(lettings_log.relat2).to eq("X")
+
+        expect(lettings_log.age3_known).to eq(0)
+        expect(lettings_log.age3).to eq(7)
+        expect(lettings_log.sex3).to eq("M")
+        expect(lettings_log.ecstat3).to eq(9)
+        expect(lettings_log.relat3).to eq("C")
+        expect(lettings_log.values_updated_at).not_to be_nil
+      end
+    end
+
+    context "when the lettings log has no details for person 2 and there are 6 household members" do
+      before do
+        lettings_log.update(details_known_2: 0, age2_known: nil, age2: nil, sex2: nil, ecstat2: nil, relat2: nil, hhmemb: 6,
+                            details_known_3: 0, age3_known: 0, age3: 19, sex3: "F", ecstat3: 10, relat3: "X",
+                            details_known_4: 1, age4_known: nil, age4: nil, sex4: nil, ecstat4: nil, relat4: nil,
+                            details_known_5: 0, age5_known: 0, age5: 21, sex5: "M", ecstat5: 1, relat5: "P",
+                            details_known_6: 0, age6_known: 0, age6: 22, sex6: "R", ecstat6: 10, relat6: "R")
+      end
+
+      it "moves the details of all the household members" do
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 3 details moved to person 2 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 4 details moved to person 3 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 5 details moved to person 4 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 6 details moved to person 5 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 6 details/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.age2_known).to eq(0)
+        expect(lettings_log.age2).to eq(19)
+        expect(lettings_log.sex2).to eq("F")
+        expect(lettings_log.ecstat2).to eq(10)
+        expect(lettings_log.relat2).to eq("X")
+
+        expect(lettings_log.details_known_3).to eq(1)
+        expect(lettings_log.age3_known).to eq(nil)
+        expect(lettings_log.age3).to eq(nil)
+        expect(lettings_log.sex3).to eq(nil)
+        expect(lettings_log.ecstat3).to eq(nil)
+        expect(lettings_log.relat3).to eq(nil)
+
+        expect(lettings_log.details_known_4).to eq(0)
+        expect(lettings_log.age4_known).to eq(0)
+        expect(lettings_log.age4).to eq(21)
+        expect(lettings_log.sex4).to eq("M")
+        expect(lettings_log.ecstat4).to eq(1)
+        expect(lettings_log.relat4).to eq("P")
+
+        expect(lettings_log.details_known_5).to eq(0)
+        expect(lettings_log.age5_known).to eq(0)
+        expect(lettings_log.age5).to eq(22)
+        expect(lettings_log.sex5).to eq("R")
+        expect(lettings_log.ecstat5).to eq(10)
+        expect(lettings_log.relat5).to eq("R")
+
+        expect(lettings_log.details_known_6).to eq(0)
+        expect(lettings_log.age6_known).to eq(0)
+        expect(lettings_log.age6).to eq(7)
+        expect(lettings_log.sex6).to eq("M")
+        expect(lettings_log.ecstat6).to eq(9)
+        expect(lettings_log.relat6).to eq("C")
+
+        expect(lettings_log.values_updated_at).not_to be_nil
+      end
+    end
+
+    context "when the lettings log has no details for person 4 and there are 6 household members" do
+      before do
+        lettings_log.update(details_known_2: 1, age2_known: nil, age2: nil, sex2: nil, ecstat2: nil, relat2: nil, hhmemb: 6,
+                            details_known_3: 0, age3_known: 0, age3: 19, sex3: "F", ecstat3: 10, relat3: "X",
+                            details_known_4: 0, age4_known: nil, age4: nil, sex4: nil, ecstat4: nil, relat4: nil,
+                            details_known_5: 0, age5_known: 0, age5: 21, sex5: "M", ecstat5: 1, relat5: "P",
+                            details_known_6: 0, age6_known: 0, age6: 22, sex6: "R", ecstat6: 10, relat6: "R")
+      end
+
+      it "moves the details of all the household members" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has details for person 2, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has details for person 3, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 5 details moved to person 4 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 6 details moved to person 5 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 6 details/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.details_known_2).to eq(1)
+        expect(lettings_log.age2_known).to eq(nil)
+        expect(lettings_log.age2).to eq(nil)
+        expect(lettings_log.sex2).to eq(nil)
+        expect(lettings_log.ecstat2).to eq(nil)
+        expect(lettings_log.relat2).to eq(nil)
+
+        expect(lettings_log.age3_known).to eq(0)
+        expect(lettings_log.age3).to eq(19)
+        expect(lettings_log.sex3).to eq("F")
+        expect(lettings_log.ecstat3).to eq(10)
+        expect(lettings_log.relat3).to eq("X")
+
+        expect(lettings_log.details_known_4).to eq(0)
+        expect(lettings_log.age4_known).to eq(0)
+        expect(lettings_log.age4).to eq(21)
+        expect(lettings_log.sex4).to eq("M")
+        expect(lettings_log.ecstat4).to eq(1)
+        expect(lettings_log.relat4).to eq("P")
+
+        expect(lettings_log.details_known_5).to eq(0)
+        expect(lettings_log.age5_known).to eq(0)
+        expect(lettings_log.age5).to eq(22)
+        expect(lettings_log.sex5).to eq("R")
+        expect(lettings_log.ecstat5).to eq(10)
+        expect(lettings_log.relat5).to eq("R")
+
+        expect(lettings_log.details_known_6).to eq(0)
+        expect(lettings_log.age6_known).to eq(0)
+        expect(lettings_log.age6).to eq(7)
+        expect(lettings_log.sex6).to eq("M")
+        expect(lettings_log.ecstat6).to eq(9)
+        expect(lettings_log.relat6).to eq("C")
+
+        expect(lettings_log.values_updated_at).not_to be_nil
+      end
+    end
+
+    context "when the lettings log has no details for several consecutive household members" do
+      before do
+        lettings_log.update(details_known_2: 1, age2_known: nil, age2: nil, sex2: nil, ecstat2: nil, relat2: nil, hhmemb: 6,
+                            details_known_3: 0, age3_known: 0, age3: 19, sex3: "F", ecstat3: 10, relat3: "X",
+                            details_known_4: 0, age4_known: nil, age4: nil, sex4: nil, ecstat4: nil, relat4: nil,
+                            details_known_5: 0, age5_known: nil, age5: nil, sex5: nil, ecstat5: nil, relat5: nil,
+                            details_known_6: 0, age6_known: 0, age6: 22, sex6: "R", ecstat6: 10, relat6: "R")
+      end
+
+      it "moves the details of all the relevant household members" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has details for person 2, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has details for person 3, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 6 details moved to person 4 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 5 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 6 details/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.details_known_2).to eq(1)
+        expect(lettings_log.age2_known).to eq(nil)
+        expect(lettings_log.age2).to eq(nil)
+        expect(lettings_log.sex2).to eq(nil)
+        expect(lettings_log.ecstat2).to eq(nil)
+        expect(lettings_log.relat2).to eq(nil)
+
+        expect(lettings_log.age3_known).to eq(0)
+        expect(lettings_log.age3).to eq(19)
+        expect(lettings_log.sex3).to eq("F")
+        expect(lettings_log.ecstat3).to eq(10)
+        expect(lettings_log.relat3).to eq("X")
+
+        expect(lettings_log.details_known_4).to eq(0)
+        expect(lettings_log.age4_known).to eq(0)
+        expect(lettings_log.age4).to eq(22)
+        expect(lettings_log.sex4).to eq("R")
+        expect(lettings_log.ecstat4).to eq(10)
+        expect(lettings_log.relat4).to eq("R")
+
+        expect(lettings_log.details_known_5).to eq(0)
+        expect(lettings_log.age5_known).to eq(0)
+        expect(lettings_log.age5).to eq(7)
+        expect(lettings_log.sex5).to eq("M")
+        expect(lettings_log.ecstat5).to eq(9)
+        expect(lettings_log.relat5).to eq("C")
+
+        expect(lettings_log.details_known_6).to eq(0)
+        expect(lettings_log.age6_known).to eq(0)
+        expect(lettings_log.age6).to eq(21)
+        expect(lettings_log.sex6).to eq(nil)
+        expect(lettings_log.ecstat6).to eq(nil)
+        expect(lettings_log.relat6).to eq(nil)
+
+        expect(lettings_log.values_updated_at).not_to be_nil
+      end
+    end
+
+    context "when the lettings log has no details for several non consecutive household members" do
+      before do
+        lettings_log.update(details_known_2: 0, age2_known: nil, age2: nil, sex2: nil, ecstat2: nil, relat2: nil, hhmemb: 6,
+                            details_known_3: 0, age3_known: 0, age3: 19, sex3: "F", ecstat3: 10, relat3: "X",
+                            details_known_4: 1, age4_known: nil, age4: nil, sex4: nil, ecstat4: nil, relat4: nil,
+                            details_known_5: 0, age5_known: nil, age5: nil, sex5: nil, ecstat5: nil, relat5: nil,
+                            details_known_6: 0, age6_known: 0, age6: 22, sex6: "R", ecstat6: 10, relat6: "R")
+      end
+
+      it "moves the details of all the relevant household members" do
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 3 details moved to person 2 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 4 details moved to person 3 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+'s person 6 details moved to person 4 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 5 details/)
+        expect(logger).to receive(:info).with(/lettings log \d+, reimported person 6 details/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.age2_known).to eq(0)
+        expect(lettings_log.age2).to eq(19)
+        expect(lettings_log.sex2).to eq("F")
+        expect(lettings_log.ecstat2).to eq(10)
+        expect(lettings_log.relat2).to eq("X")
+
+        expect(lettings_log.details_known_3).to eq(1)
+        expect(lettings_log.age3_known).to eq(nil)
+        expect(lettings_log.age3).to eq(nil)
+        expect(lettings_log.sex3).to eq(nil)
+        expect(lettings_log.ecstat3).to eq(nil)
+        expect(lettings_log.relat3).to eq(nil)
+
+        expect(lettings_log.details_known_4).to eq(0)
+        expect(lettings_log.age4_known).to eq(0)
+        expect(lettings_log.age4).to eq(22)
+        expect(lettings_log.sex4).to eq("R")
+        expect(lettings_log.ecstat4).to eq(10)
+        expect(lettings_log.relat4).to eq("R")
+
+        expect(lettings_log.details_known_5).to eq(0)
+        expect(lettings_log.age5_known).to eq(0)
+        expect(lettings_log.age5).to eq(7)
+        expect(lettings_log.sex5).to eq("M")
+        expect(lettings_log.ecstat5).to eq(9)
+        expect(lettings_log.relat5).to eq("C")
+
+        expect(lettings_log.details_known_6).to eq(0)
+        expect(lettings_log.age6_known).to eq(0)
+        expect(lettings_log.age6).to eq(21)
+        expect(lettings_log.sex6).to eq(nil)
+        expect(lettings_log.ecstat6).to eq(nil)
+        expect(lettings_log.relat6).to eq(nil)
+
+        expect(lettings_log.values_updated_at).not_to be_nil
+      end
+    end
+
+    context "when the lettings log has details for person 2" do
+      let(:lettings_log) { LettingsLog.find_by(old_id: lettings_log_id) }
+
+      before do
+        lettings_log.update(details_known_2: 0, age2: 22)
+      end
+
+      it "does not update the lettings_log person details" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has all household member details, skipping update/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.values_updated_at).to be_nil
+      end
+    end
+
+    context "when the person 2 details are not known" do
+      let(:lettings_log) { LettingsLog.find_by(old_id: lettings_log_id) }
+
+      before do
+        lettings_log.update(details_known_2: 1)
+      end
+
+      it "does not update the lettings_log person details" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has all household member details, skipping update/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.values_updated_at).to be_nil
+      end
+    end
+
+    context "when none of the details past hhmemb are given in the reimport" do
+      let(:lettings_log) { LettingsLog.find_by(old_id: lettings_log_id) }
+
+      before do
+        lettings_log.update!(hhmemb: 7)
+        lettings_log_xml.at_xpath("//xmlns:P8Age").content = ""
+        lettings_log_xml.at_xpath("//xmlns:P8Sex").content = ""
+        lettings_log_xml.at_xpath("//xmlns:P8Rel").content = ""
+        lettings_log_xml.at_xpath("//xmlns:P8Eco").content = ""
+      end
+
+      it "does not update the lettings_log person details" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has no additional household member details, skipping update/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.values_updated_at).to be_nil
+      end
+    end
+
+    context "when the record has no hhmemb" do
+      let(:lettings_log) { LettingsLog.find_by(old_id: lettings_log_id) }
+
+      before do
+        lettings_log.update!(hhmemb: nil)
+      end
+
+      it "does not update the lettings_log person details" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has no hhmemb, skipping update/)
+        import_service.send(:update_person_details, lettings_log_xml)
+        lettings_log.reload
+        expect(lettings_log.values_updated_at).to be_nil
+      end
+    end
+  end
 end