diff --git a/app/helpers/duplicate_logs_helper.rb b/app/helpers/duplicate_logs_helper.rb
index 077845857..92490c10f 100644
--- a/app/helpers/duplicate_logs_helper.rb
+++ b/app/helpers/duplicate_logs_helper.rb
@@ -55,16 +55,18 @@ module DuplicateLogsHelper
     duplicate_sets_count > 1 ? "Review these #{duplicate_sets_count} sets of logs" : "Review this #{duplicate_sets_count} set of logs"
   end
 
-  def duplicate_log_question_label(question)
-    if question.id == "uprn"
+  def duplicate_log_question_label(question, log)
+    if question.id == "uprn" && !log.form.start_year_2026_or_later?
       "Postcode (from UPRN)"
+    elsif question.id == "address_line1"
+      "#{question.question_number_string} - Address line 1"
     else
       get_question_label(question)
     end
   end
 
   def duplicate_log_answer_label(question, log)
-    if question.id == "uprn"
+    if question.id == "uprn" && !log.form.start_year_2026_or_later?
       postcode_question = log.form.get_question("postcode_full", log)
       get_answer_label(postcode_question, log)
     else
@@ -73,16 +75,26 @@ module DuplicateLogsHelper
   end
 
   def duplicate_log_extra_value(question, log)
-    if question.id == "uprn"
+    if log.form.start_year_2026_or_later?
+      case question.id
+      when "uprn"
+        value = [
+          log.address_line1,
+          log.postcode_full,
+        ].select(&:present?)
+
+        "\n\n#{value.join("\n")}"
+      else
+        question.get_extra_check_answer_value(log)
+      end
+    elsif question.id == "uprn" && !log.form.start_year_2026_or_later?
       postcode_question = log.form.get_question("postcode_full", log)
       postcode_question.get_extra_check_answer_value(log)
-    else
-      question.get_extra_check_answer_value(log)
     end
   end
 
   def duplicate_log_answer_label_present(question, log, current_user)
-    if question.id == "uprn"
+    if question.id == "uprn" && !log.form.start_year_2026_or_later?
       postcode_question = log.form.get_question("postcode_full", log)
       postcode_question.answer_label(log, current_user).present?
     else
@@ -91,7 +103,7 @@ module DuplicateLogsHelper
   end
 
   def duplicate_log_inferred_answers(question, log)
-    if question.id == "uprn"
+    if question.id == "uprn" && !log.form.start_year_2026_or_later?
       postcode_question = log.form.get_question("postcode_full", log)
       postcode_question.get_inferred_answers(log)
     else
diff --git a/app/models/lettings_log.rb b/app/models/lettings_log.rb
index a8e494b5b..741bc6024 100644
--- a/app/models/lettings_log.rb
+++ b/app/models/lettings_log.rb
@@ -725,11 +725,13 @@ class LettingsLog < Log
     ["owning_organisation_id",
      "startdate",
      "tenancycode",
-     uprn.blank? ? "postcode_full" : "uprn",
+     form.start_year_2026_or_later? ? "address_line1" : nil,
+     "postcode_full",
+     "uprn",
      "scheme_id",
-     "location_id",
+     form.start_year_2026_or_later? ? nil : "location_id",
      "age1",
-     "sex1",
+     form.start_year_2026_or_later? ? "sexrab1" : "sex1",
      "ecstat1",
      household_charge == 1 ? "household_charge" : nil,
      "tcharge",
diff --git a/app/views/duplicate_logs/_duplicate_log_check_answers.erb b/app/views/duplicate_logs/_duplicate_log_check_answers.erb
index 91deb10c8..8dbe7056f 100644
--- a/app/views/duplicate_logs/_duplicate_log_check_answers.erb
+++ b/app/views/duplicate_logs/_duplicate_log_check_answers.erb
@@ -3,7 +3,7 @@
     <%= govuk_summary_list do |summary_list| %>
       <% log.duplicate_check_questions(current_user).each do |question| %>
         <% summary_list.with_row do |row| %>
-          <% row.with_key { duplicate_log_question_label(question) } %>
+          <% row.with_key { duplicate_log_question_label(question, log) } %>
 
           <% row.with_value do %>
             <%= simple_format(