diff --git a/python/uatk_spc/reader.py b/python/uatk_spc/reader.py
index ced2f30..e89de7e 100644
--- a/python/uatk_spc/reader.py
+++ b/python/uatk_spc/reader.py
@@ -1,3 +1,4 @@
+import os
 from typing import Any, Dict
 from google.protobuf.json_format import MessageToDict
 import polars as pl
@@ -35,9 +36,9 @@ class SPCReaderProto:
     venues_per_activity: Dict[str, Any]
     info_per_msoa: Dict[str, Any]
 
-    def __init__(self, path: str):
+    def __init__(self, path: str, region: str):
         """Init from a path and region."""
-        self.pop = SPCReaderProto.read_pop(path)
+        self.pop = SPCReaderProto.read_pop(os.path.join(path, region + ".pb"))
         pop_as_dict = MessageToDict(self.pop, including_default_value_fields=True)
         self.households = pl.from_records(pop_as_dict["households"])
         self.people = pl.from_records(pop_as_dict["people"])
@@ -73,8 +74,8 @@ class SPCReaderParquet:
     venues_per_activity: pl.DataFrame
     info_per_msoa: dict
 
-    def __init__(self, path: str):
-        path_ = path.split(".pb")[0]
+    def __init__(self, path: str, region: str):
+        path_ = os.path.join(path, region)
         self.households = pl.read_parquet(path_ + "_households.pq")
         self.people = pl.read_parquet(path_ + "_people.pq")
         self.time_use_diaries = pl.read_parquet(path_ + "_time_use_diaries.pq")