diff --git a/templates/trip_page.html b/templates/trip_page.html
index e772fc6..20b1c00 100644
--- a/templates/trip_page.html
+++ b/templates/trip_page.html
@@ -492,7 +492,7 @@ build_map("map", coordinates, routes);
 
 function timezoneOffsetLabel(offsetMinutes) {
   if (offsetMinutes === 0) {
-    return "No difference";
+    return "Same time as Bristol";
   }
   const sign = offsetMinutes > 0 ? "+" : "-";
   const abs = Math.abs(offsetMinutes);
diff --git a/web_view.py b/web_view.py
index 57cb930..236d27d 100755
--- a/web_view.py
+++ b/web_view.py
@@ -3,6 +3,7 @@
 """Web page to show upcoming events."""
 
 import decimal
+import functools
 import hashlib
 import importlib
 import inspect
@@ -806,6 +807,7 @@ def _timezone_from_coordinates(latitude: float, longitude: float) -> str | None:
     return None
 
 
+@functools.lru_cache(maxsize=1)
 def _get_timezone_finder() -> typing.Any:
     """Get timezone finder instance if dependency is available."""
     try: