diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c4f5b82f..603761fe 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -44,6 +44,7 @@ below.
  - Mel Hall
  - Bruno Kinoshita
  - Hilary Oliver
+ - Jonny Williams
 <!-- end-shortlog -->
 
 (All contributors are identifiable with email addresses in the git version
diff --git a/cylc/rose/jinja2_parser.py b/cylc/rose/jinja2_parser.py
index 491f9827..3dae5a34 100644
--- a/cylc/rose/jinja2_parser.py
+++ b/cylc/rose/jinja2_parser.py
@@ -161,10 +161,11 @@ def patch_jinja2_leading_zeros():
     if jinja2.lexer.Lexer.wrap._instances:
         num_examples = 5
         LOG.warning(
-            'Support for integers with leading zeros was dropped'
-            ' in Jinja2 v3.'
+            'Support for integers with leading zeros (including 
+            ' lists of integers) was dropped in Jinja2 v3.'
             ' Rose will extend support until a future version.'
-            '\nPlease amend your Rose configuration files e.g:'
+            '\nPlease amend your Rose configuration files,
+            ' which currently contain:'
             '\n * '
             + (
                 '\n * '.join(