diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index be69dac..d76574e 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -6,3 +6,4 @@
 | jennyhickson    | Jenny Hickson   | Met Office  | 2026-03-02 |
 | yaswant         | Yaswant Pradhan | Met Office  | 2026-05-22 |
 | arjclark        | Andrew Clark    | Met Office  | 2026-09-08 |
+| r-sharp         | R Sharp         | Met Office  | 2026-10-13 |
diff --git a/mule/lib/mule/pp.py b/mule/lib/mule/pp.py
index 2e514c1..e26dee6 100644
--- a/mule/lib/mule/pp.py
+++ b/mule/lib/mule/pp.py
@@ -305,11 +305,13 @@ def fields_to_pp_file(pp_file_obj_or_path, field_or_fields,
 
         # If the field appears to be variable resolution, attach the
         # relevant extra data (requires that a UM file object was given)
+        not_timeseries = field.lbcode not in [31320, ]
         vector = {}
-        if (field.bzx == field.bmdi
+        if ( not_timeseries and
+                (  field.bzx == field.bmdi
                 or field.bzy == field.bmdi
                 or field.bdx == field.bmdi
-                or field.bdy == field.bmdi):
+                or field.bdy == field.bmdi) ):
 
             # The variable resolution data can either be already attached
             # to the field (most likely if it has already come from an existing