diff --git a/app/models/log.rb b/app/models/log.rb
index f5f5f4946..52a197d97 100644
--- a/app/models/log.rb
+++ b/app/models/log.rb
@@ -135,9 +135,34 @@ private
     process_postcode(ppostcode_full, "ppcodenk", "is_previous_la_inferred", "prevloc")
   end
 
+  LA_CHANGES = {
+    "E07000027" => "E06000063", # Barrow-in-Furness => Cumberland
+    "E07000030" => "E06000063", # Eden => Cumberland
+    "E07000031" => "E06000063", # South Lakeland => Cumberland
+    "E07000026" => "E06000064", # Allerdale => Westmorland and Furness
+    "E07000028" => "E06000064", # Carlisle => Westmorland and Furness
+    "E07000029" => "E06000064", # Copeland => Westmorland and Furness
+    "E07000163" => "E06000065", # Craven => North Yorkshire
+    "E07000164" => "E06000065", # Hambleton => North Yorkshire
+    "E07000165" => "E06000065", # Harrogate => North Yorkshire
+    "E07000166" => "E06000065", # Richmondshire => North Yorkshire
+    "E07000167" => "E06000065", # Ryedale => North Yorkshire
+    "E07000168" => "E06000065", # Scarborough => North Yorkshire
+    "E07000169" => "E06000065", # Selby => North Yorkshire
+    "E07000187" => "E06000066", # Mendip => Somerset
+    "E07000188" => "E06000066", # Sedgemoor => Somerset
+    "E07000246" => "E06000066", # Somerset West and Taunton => Somerset
+    "E07000189" => "E06000066", # South Somerset => Somerset
+  }.freeze
+
   def get_inferred_la(postcode)
     result = PIO.lookup(postcode)
-    result[:location_code] if result
+    location_code = result[:location_code] if result
+    if LA_CHANGES.key?(location_code) && form.start_date.year >= 2023
+      LA_CHANGES[location_code]
+    else
+      location_code
+    end
   end
 
   def upcase_and_remove_whitespace(string)
diff --git a/spec/models/sales_log_spec.rb b/spec/models/sales_log_spec.rb
index b82fe6fe3..d4814df14 100644
--- a/spec/models/sales_log_spec.rb
+++ b/spec/models/sales_log_spec.rb
@@ -226,6 +226,37 @@ RSpec.describe SalesLog, type: :model do
       expect(record_from_db["la"]).to eq("E08000003")
     end
 
+    context "with 23/24 logs" do
+      let(:address_sales_log_23_24) do
+        described_class.create({
+          owning_organisation:,
+          created_by: created_by_user,
+          ppcodenk: 1,
+          postcode_full: "CA10 1AA",
+          saledate: Time.zone.local(2023, 5, 2),
+        })
+      end
+
+      before do
+        WebMock.stub_request(:get, /api.postcodes.io\/postcodes\/CA101AA/)
+        .to_return(status: 200, body: '{"status":200,"result":{"admin_district":"Eden","codes":{"admin_district":"E07000030"}}}', headers: {})
+
+        Timecop.freeze(2023, 4, 1)
+        Singleton.__init__(FormHandler)
+      end
+
+      after do
+        Timecop.unfreeze
+        Singleton.__init__(FormHandler)
+      end
+
+      it "correctly infers new la" do
+        record_from_db = ActiveRecord::Base.connection.execute("select la from sales_logs where id=#{address_sales_log_23_24.id}").to_a[0]
+        expect(address_sales_log_23_24.la).to eq("E06000063")
+        expect(record_from_db["la"]).to eq("E06000063")
+      end
+    end
+
     it "errors if the property postcode is emptied" do
       expect { address_sales_log.update!({ postcode_full: "" }) }
         .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)