README.md in rubocop-govuk-4.2.0 vs README.md in rubocop-govuk-4.3.0

@@ -22,9 +22,19 @@
     - config/default.yml
 
 inherit_mode:
   merge:
     - Exclude
+
+# **************************************************************
+# TRY NOT TO ADD OVERRIDES IN THIS FILE
+#
+# This repo is configured to follow the RuboCop GOV.UK styleguide.
+# Any rules you override here will cause this repo to diverge from
+# the way we write code in all other GOV.UK repos.
+#
+# See https://github.com/alphagov/rubocop-govuk/blob/main/CONTRIBUTING.md
+# **************************************************************
 ```
 
 You can also configure additional rules for Rails and RSpec:
 
 ```yaml