diff --git a/x-govuk/components/primary-navigation/_primary-navigation.scss b/x-govuk/components/primary-navigation/_primary-navigation.scss
index 255f787..5fa7307 100644
--- a/x-govuk/components/primary-navigation/_primary-navigation.scss
+++ b/x-govuk/components/primary-navigation/_primary-navigation.scss
@@ -5,10 +5,6 @@
   margin-bottom: -1px;
 }
 
-.govuk-phase-banner + .x-govuk-primary-navigation {
-  margin-top: -1px;
-}
-
 .x-govuk-primary-navigation__list {
   @include govuk-clearfix;
   list-style: none;