diff --git a/app/services/imports/lettings_logs_field_import_service.rb b/app/services/imports/lettings_logs_field_import_service.rb
index cc53991a4..3c6bccf87 100644
--- a/app/services/imports/lettings_logs_field_import_service.rb
+++ b/app/services/imports/lettings_logs_field_import_service.rb
@@ -267,9 +267,16 @@ module Imports
       return @logger.warn("lettings log with old id #{old_id} not found") unless record
       return @logger.info("lettings log #{record.id} has no hhmemb value, skipping update") if record.hhmemb.blank?
 
+      if record.sex1.present?
+        @logger.info("lettings log #{record.id} has value for sex1, skipping person")
+      else
+        record.sex1 = sex(xml_doc, 1)
+        @logger.info("lettings log #{record.id}'s sex1 value has been set to #{record.sex1}")
+      end
+
       (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_not_known_for_person?(i)
+        next @logger.info("lettings log #{record.id} has values for sex#{i} and relat#{i}, skipping person") if record["sex#{i}"] && record["relat#{i}"]
+        next @logger.info("lettings log #{record.id} has value 'no' for details_known_#{i}, skipping person") if record.details_not_known_for_person?(i)
 
         if record["sex#{i}"].blank?
           record["sex#{i}"] = sex(xml_doc, i)
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 733d73b8a..60f765c26 100644
--- a/spec/services/imports/lettings_logs_field_import_service_spec.rb
+++ b/spec/services/imports/lettings_logs_field_import_service_spec.rb
@@ -787,29 +787,33 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
     before do
       Imports::LettingsLogsImportService.new(storage_service, logger).create_logs(fixture_directory)
       lettings_log_file.rewind
+      lettings_log_xml.at_xpath("//xmlns:P1Sex").content = "Person prefers not to say"
       lettings_log_xml.at_xpath("//xmlns:P2Sex").content = "Person prefers not to say"
       lettings_log_xml.at_xpath("//xmlns:P2Rel").content = "Person prefers not to say"
     end
 
     context "when the lettings log has no sex or relat value" do
       before do
-        lettings_log.update!(sex2: nil, relat2: nil, details_known_2: 0, values_updated_at: nil)
+        lettings_log.update!(sex1: nil, sex2: nil, relat2: nil, details_known_2: 0, values_updated_at: nil)
       end
 
       it "updates the lettings_log sex and relat value if details for person are known" do
+        expect(logger).to receive(:info).with(/lettings log \d+'s sex1 value has been set to R/)
         expect(logger).to receive(:info).with(/lettings log \d+'s sex2 value has been set to R/)
         expect(logger).to receive(:info).with(/lettings log \d+'s relat2 value has been set to R/)
         import_service.send(:update_sex_and_relat, lettings_log_xml)
         lettings_log.reload
+        expect(lettings_log.sex1).to eq("R")
         expect(lettings_log.sex2).to eq("R")
         expect(lettings_log.relat2).to eq("R")
         expect(lettings_log.values_updated_at).not_to be_nil
       end
 
       it "does not update the lettings_log sex and relat value if details for person are not known" do
-        lettings_log.update!(details_known_2: 1)
+        lettings_log.update!(details_known_2: 1, sex1: "M")
 
-        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_2, skipping update/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value for sex1, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_2, skipping person/)
         import_service.send(:update_sex_and_relat, lettings_log_xml)
         lettings_log.reload
         expect(lettings_log.sex2).to eq(nil)
@@ -824,7 +828,8 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
       end
 
       it "does not update the lettings_log sex and relat values" do
-        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex2 and relat2, skipping update/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value for sex1, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex2 and relat2, skipping person/)
         import_service.send(:update_sex_and_relat, lettings_log_xml)
         lettings_log.reload
         expect(lettings_log.sex2).to eq("F")
@@ -839,6 +844,7 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
       end
 
       it "only updates relat value" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has value for sex1, skipping person/)
         expect(logger).to receive(:info).with(/lettings log \d+'s relat2 value has been set to R/)
         import_service.send(:update_sex_and_relat, lettings_log_xml)
         lettings_log.reload
@@ -854,6 +860,7 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
       end
 
       it "only updates sex value" do
+        expect(logger).to receive(:info).with(/lettings log \d+ has value for sex1, skipping person/)
         expect(logger).to receive(:info).with(/lettings log \d+'s sex2 value has been set to R/)
         import_service.send(:update_sex_and_relat, lettings_log_xml)
         lettings_log.reload
@@ -894,12 +901,13 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
                              sex6: nil, relat6: nil, details_known_6: 1,
                              hhmemb: 6, values_updated_at: nil)
 
-        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex2 and relat2, skipping update/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value for sex1, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex2 and relat2, skipping person/)
         expect(logger).to receive(:info).with(/lettings log \d+'s sex3 value has been set to R/)
         expect(logger).to receive(:info).with(/lettings log \d+'s relat3 value has been set to R/)
         expect(logger).to receive(:info).with(/lettings log \d+'s relat4 value has been set to R/)
         expect(logger).to receive(:info).with(/lettings log \d+'s sex5 value has been set to R/)
-        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_6, skipping update/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_6, skipping person/)
         import_service.send(:update_sex_and_relat, lettings_log_xml)
 
         lettings_log.reload
@@ -926,11 +934,11 @@ RSpec.describe Imports::LettingsLogsFieldImportService do
                              sex4: "F", relat4: "X", details_known_4: 0,
                              sex5: nil, relat5: nil, details_known_5: 1,
                              hhmemb: 5, values_updated_at: nil)
-
-        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex2 and relat2, skipping update/)
-        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_3, skipping update/)
-        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex4 and relat4, skipping update/)
-        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_5, skipping update/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value for sex1, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex2 and relat2, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_3, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has values for sex4 and relat4, skipping person/)
+        expect(logger).to receive(:info).with(/lettings log \d+ has value 'no' for details_known_5, skipping person/)
 
         import_service.send(:update_sex_and_relat, lettings_log_xml)
         expect(lettings_log.values_updated_at).to be_nil