diff --git a/applications/postcode_splitter/local_handler/invoke_local_lambda.py b/applications/postcode_splitter/local_handler/invoke_local_lambda.py
index 21fa9b9e..17d7e345 100755
--- a/applications/postcode_splitter/local_handler/invoke_local_lambda.py
+++ b/applications/postcode_splitter/local_handler/invoke_local_lambda.py
@@ -14,7 +14,7 @@ payload = {
                 {
                     "task_id": "f4b3332f-c0cc-481f-96a5-d39860a647cf",
                     "sub_task_id": "14c042de-40c4-473b-8cd8-72c983a94a8d",
-                    "s3_uri": "s3://retrofit-data-dev/ara_raw_inputs/calico/Calico Homes Full list EPC Properties(Sheet2) (1) (1).csv",
+                    "s3_uri": "s3://retrofit-data-dev/bulk_onboarding_inputs/hyde2.csv",
                 }
             )
         }
diff --git a/infrastructure/csv_s3_client.py b/infrastructure/csv_s3_client.py
index 055d1ce3..8af8de73 100644
--- a/infrastructure/csv_s3_client.py
+++ b/infrastructure/csv_s3_client.py
@@ -13,7 +13,12 @@ class CsvS3Client(S3Client):
                 f"s3_uri bucket {bucket!r} does not match client bucket {self.bucket!r}"
             )
         raw = self.get_object(key)
-        text = raw.decode("utf-8-sig")
+        try:
+            text = raw.decode("utf-8-sig")
+        except UnicodeDecodeError:
+            # Some uploads are Windows-1252 (e.g. £ as byte 0xA3), not UTF-8.
+            text = raw.decode("cp1252")
+
         reader = csv.DictReader(StringIO(text))
         return [dict(row) for row in reader]