diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8fd2e5a1..619a7eb30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # NHS.UK frontend Changelog
 
+## Unreleased
+
+:wrench: **Fixes**
+
+- Update header styles so that `.nhsuk-header__search-no-nav` class is no longer needed when header contains a search field but no navigation ([PR 1046](https://github.com/nhsuk/nhsuk-frontend/pull/1046))
+
 ## 9.0.1 - 9 October 2024
 
 :wrench: **Fixes**
diff --git a/packages/components/header/_header-transactional.scss b/packages/components/header/_header-transactional.scss
index abea22684..bfce5ab28 100644
--- a/packages/components/header/_header-transactional.scss
+++ b/packages/components/header/_header-transactional.scss
@@ -3,12 +3,9 @@
 */
 
 .nhsuk-header__transactional-service-name {
+  margin-bottom: -(nhsuk-spacing(1));
   padding-left: nhsuk-spacing(3);
-  padding-top: 3px;
-
-  @include mq($until: tablet) {
-    padding-bottom: nhsuk-spacing(3);
-  }
+  padding-top: 2px;
 
   @include mq($until: tablet) {
     padding-left: 0;
diff --git a/packages/components/header/_header-white.scss b/packages/components/header/_header-white.scss
index a59a610c4..6ff7fe321 100644
--- a/packages/components/header/_header-white.scss
+++ b/packages/components/header/_header-white.scss
@@ -19,6 +19,12 @@
     background-color: $color_nhsuk-blue;
   }
 
+  .nhsuk-navigation {
+    .nhsuk-header__navigation-list {
+      border-top: none;
+    }
+  }
+
   .nhsuk-logo {
     .nhsuk-logo__background {
       fill: $color_nhsuk-blue;
@@ -100,6 +106,7 @@
   .nhsuk-navigation-container {
     background-color: $color_nhsuk-white;
   }
+
   .nhsuk-navigation {
     background-color: $color_nhsuk-white;
 
diff --git a/packages/components/header/_header.scss b/packages/components/header/_header.scss
index 36d0e7a55..37f0b4600 100644
--- a/packages/components/header/_header.scss
+++ b/packages/components/header/_header.scss
@@ -26,12 +26,7 @@
   @include govuk-width-container;
   padding: 20px 0;
 
-  @include mq($until: tablet) {
-    padding-bottom: 0;
-  }
-
   @include mq($from: tablet) {
-    border-bottom: 1px solid $color_transparent_nhsuk-white-20;
     display: flex;
     justify-content: space-between;
   }
@@ -113,9 +108,6 @@
 .nhsuk-header__logo--only {
   max-width: 100%;
 
-  @include mq($until: tablet) {
-    padding-bottom: nhsuk-spacing(3);
-  }
   @include mq($from: tablet) {
     .nhsuk-header__link--service {
       align-items: center;
@@ -155,10 +147,6 @@
   }
 }
 
-.nhsuk-header__search-no-nav {
-  padding-bottom: nhsuk-spacing(3);
-}
-
 .nhsuk-header__search-form {
   height: 100%;
   overflow: visible;
@@ -487,6 +475,10 @@
 .nhsuk-navigation-container {
   @include print-hide();
   position: relative;
+
+  @include mq($until: tablet) {
+    margin-top: -20px;
+  }
 }
 
 // ul of hidden nav
@@ -537,6 +529,12 @@
   }
 }
 
+.nhsuk-header__navigation-list {
+  @include mq($from: tablet) {
+    border-top: 1px solid $color_transparent_nhsuk-white-20;
+  }
+}
+
 .nhsuk-header__navigation-list--left-aligned {
   @include mq($from: desktop) {
     justify-content: initial;
diff --git a/packages/components/header/template.njk b/packages/components/header/template.njk
index 5419e7627..9839bccbf 100644
--- a/packages/components/header/template.njk
+++ b/packages/components/header/template.njk
@@ -16,9 +16,9 @@
 {%- if params.organisation and params.organisation.name %} nhsuk-header--organisation{% endif %}
 {%- if params.classes %} {{ params.classes }}{% endif %}" role="banner"
 {{- nhsukAttributes(params.attributes) }}>
-  
+
   <div class="nhsuk-header__container">
-    <div class="nhsuk-header__logo 
+    <div class="nhsuk-header__logo
     {%- if showNav == "false" and showSearch == "false" and params.transactionalService %} nhsuk-header__transactional--logo{% endif %}
     {%- if showNav == "false" and showSearch == "false" and not params.transactionalService %} nhsuk-header__logo--only{% endif %}">
       {%- if params.organisation %}
@@ -42,128 +42,62 @@
       </a>
       {%- endif %}
     </div>
-    
-
-    {%- if showNav == "false" and showSearch == "false"%}
-
-      {%- if params.transactionalService%}
-        <div class="nhsuk-header__transactional-service-name">
-          <a class="nhsuk-header__transactional-service-name--link" href="{% if params.transactionalService.href %}{{ params.transactionalService.href }}{% else %}/{% endif %}">{{ params.transactionalService.name }}</a>
-        </div>
-        
-      {%- endif %}
-
-    </div>{# close nhsuk-header__container #}
-    
 
-    {% endif -%}
-
-    {% if showNav == "true" and params.primaryLinks and showSearch == "true" %}
-
-      <div class="nhsuk-header__content" id="content-header">
-        <div class="nhsuk-header__search">
-            <div class="nhsuk-header__search-wrap" id="wrap-search">
-              <form class="nhsuk-header__search-form" id="search" action="{{ params.searchAction if params.searchAction else 'https://www.nhs.uk/search/' }}" method="get" role="search">
-                <label class="nhsuk-u-visually-hidden" for="search-field">Search the NHS website</label>
-                <input class="nhsuk-search__input" id="search-field" name="{{ params.searchInputName if params.searchInputName else "search-field" }}" type="search" placeholder="Search" autocomplete="off" >
-                <button class="nhsuk-search__submit" type="submit">
-                  <svg class="nhsuk-icon nhsuk-icon__search" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false">
-                    <path d="M19.71 18.29l-4.11-4.1a7 7 0 1 0-1.41 1.41l4.1 4.11a1 1 0 0 0 1.42 0 1 1 0 0 0 0-1.42zM5 10a5 5 0 1 1 5 5 5 5 0 0 1-5-5z"></path>
-                  </svg>
-                  <span class="nhsuk-u-visually-hidden">Search</span>
-                </button>
-              </form>
-            </div>
-          </div>
-      </div>
-
-    </div>{# close nhsuk-header__container #}
-    <div class="nhsuk-navigation-container">
-      <nav class="nhsuk-navigation" id="header-navigation" role="navigation" aria-label="Primary navigation">
-        <ul class="nhsuk-header__navigation-list {%- if params.primaryLinks.length < 4 %} nhsuk-header__navigation-list--left-aligned{% endif %}">
-          {%- for item in params.primaryLinks %}
-          <li class="nhsuk-header__navigation-item {%- if item.classes %} {{ item.classes }}{% endif %}" {{- nhsukAttributes(item.attributes) }}>
-            <a class="nhsuk-header__navigation-link"  href="{{item.url}}">
-              {{item.label}}
-            </a>
-          </li>
-          {%- endfor %}
-          <li class="nhsuk-header__navigation-item nhsuk-header__navigation-item--home">
-            <a class="nhsuk-header__navigation-link"  href="/">
-              Home
-            </a>
-          </li>
-          <li class="nhsuk-mobile-menu-container">
-            <button class="nhsuk-header__menu-toggle nhsuk-header__navigation-link" id="toggle-menu" aria-expanded="false">
-              <span class="nhsuk-u-visually-hidden">Browse</span>
-              More
-              <svg class="nhsuk-icon nhsuk-icon__chevron-down" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false">
-                <path d="M15.5 12a1 1 0 0 1-.29.71l-5 5a1 1 0 0 1-1.42-1.42l4.3-4.29-4.3-4.29a1 1 0 0 1 1.42-1.42l5 5a1 1 0 0 1 .29.71z"></path>
-              </svg>
-            </button>
-          </li>
-        </ul>
-      </nav>
+{%- if showNav == "false" and showSearch == "false"%}
+  {%- if params.transactionalService%}
+    <div class="nhsuk-header__transactional-service-name">
+      <a class="nhsuk-header__transactional-service-name--link" href="{% if params.transactionalService.href %}{{ params.transactionalService.href }}{% else %}/{% endif %}">{{ params.transactionalService.name }}</a>
     </div>
-
-
-    {% endif -%}
-
-    {% if showSearch == "true" and showNav == "false" %}
-
-      <div class="nhsuk-header__content" id="content-header">
-        <div class="nhsuk-header__search nhsuk-header__search-no-nav">
-            <div class="nhsuk-header__search-wrap js-show" id="wrap-search">
-              <form class="nhsuk-header__search-form" id="search" action="{{ params.searchAction if params.searchAction else 'https://www.nhs.uk/search/' }}" method="get" role="search">
-                <label class="nhsuk-u-visually-hidden" for="search-field">Search the NHS website</label>
-                <input class="nhsuk-search__input" id="search-field" name="{{ params.searchInputName if params.searchInputName else "search-field" }}" type="search" placeholder="Search" autocomplete="off" >
-                <button class="nhsuk-search__submit" type="submit">
-                  <svg class="nhsuk-icon nhsuk-icon__search" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false">
-                    <path d="M19.71 18.29l-4.11-4.1a7 7 0 1 0-1.41 1.41l4.1 4.11a1 1 0 0 0 1.42 0 1 1 0 0 0 0-1.42zM5 10a5 5 0 1 1 5 5 5 5 0 0 1-5-5z"></path>
-                  </svg>
-                  <span class="nhsuk-u-visually-hidden">Search</span>
-                </button>
-              </form>
-            </div>
+  {%- endif %}
+{% endif -%}
+
+{% if showSearch == "true" %}
+    <div class="nhsuk-header__content" id="content-header">
+      <div class="nhsuk-header__search">
+          <div class="nhsuk-header__search-wrap" id="wrap-search">
+            <form class="nhsuk-header__search-form" id="search" action="{{ params.searchAction if params.searchAction else 'https://www.nhs.uk/search/' }}" method="get" role="search">
+              <label class="nhsuk-u-visually-hidden" for="search-field">Search the NHS website</label>
+              <input class="nhsuk-search__input" id="search-field" name="{{ params.searchInputName if params.searchInputName else "search-field" }}" type="search" placeholder="Search" autocomplete="off" >
+              <button class="nhsuk-search__submit" type="submit">
+                <svg class="nhsuk-icon nhsuk-icon__search" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+                  <path d="M19.71 18.29l-4.11-4.1a7 7 0 1 0-1.41 1.41l4.1 4.11a1 1 0 0 0 1.42 0 1 1 0 0 0 0-1.42zM5 10a5 5 0 1 1 5 5 5 5 0 0 1-5-5z"></path>
+                </svg>
+                <span class="nhsuk-u-visually-hidden">Search</span>
+              </button>
+            </form>
           </div>
-      </div>
-
-    </div>{# close nhsuk-header__container #}
-
-    {% endif -%}
-
-    {% if showNav == "true" and params.primaryLinks and showSearch == "false" %}
-
-    </div>{# close nhsuk-header__container #}
-    
-    <div class="nhsuk-navigation-container">
-      <nav class="nhsuk-navigation" id="header-navigation" role="navigation" aria-label="Primary navigation">
-        <ul class="nhsuk-header__navigation-list {%- if params.primaryLinks.length < 4 %} nhsuk-header__navigation-list--left-aligned{% endif %}">
-          {%- for item in params.primaryLinks %}
-          <li class="nhsuk-header__navigation-item {%- if item.classes %} {{ item.classes }}{% endif %}" {{- nhsukAttributes(item.attributes) }}>
-            <a class="nhsuk-header__navigation-link"  href="{{item.url}}">
-              {{item.label}}
-            </a>
-          </li>
-          {%- endfor %}
-          <li class="nhsuk-header__navigation-item nhsuk-header__navigation-item--home">
-            <a class="nhsuk-header__navigation-link"  href="/">
-              Home
-            </a>
-          </li>
-          <li class="nhsuk-mobile-menu-container">
-            <button class="nhsuk-header__menu-toggle nhsuk-header__navigation-link" id="toggle-menu" aria-expanded="false">
-              <span class="nhsuk-u-visually-hidden">Browse</span>
-              More
-              <svg class="nhsuk-icon nhsuk-icon__chevron-down" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false">
-                <path d="M15.5 12a1 1 0 0 1-.29.71l-5 5a1 1 0 0 1-1.42-1.42l4.3-4.29-4.3-4.29a1 1 0 0 1 1.42-1.42l5 5a1 1 0 0 1 .29.71z"></path>
-              </svg>
-            </button>
-          </li>
-        </ul>
-      </nav>
+        </div>
     </div>
-
-    {% endif -%}
-
+{% endif -%}
+  </div>{# close nhsuk-header__container #}
+
+{% if showNav == "true" and params.primaryLinks %}
+  <div class="nhsuk-navigation-container">
+    <nav class="nhsuk-navigation" id="header-navigation" role="navigation" aria-label="Primary navigation">
+      <ul class="nhsuk-header__navigation-list {%- if params.primaryLinks.length < 4 %} nhsuk-header__navigation-list--left-aligned{% endif %}">
+        {%- for item in params.primaryLinks %}
+        <li class="nhsuk-header__navigation-item {%- if item.classes %} {{ item.classes }}{% endif %}" {{- nhsukAttributes(item.attributes) }}>
+          <a class="nhsuk-header__navigation-link"  href="{{item.url}}">
+            {{item.label}}
+          </a>
+        </li>
+        {%- endfor %}
+        <li class="nhsuk-header__navigation-item nhsuk-header__navigation-item--home">
+          <a class="nhsuk-header__navigation-link"  href="/">
+            Home
+          </a>
+        </li>
+        <li class="nhsuk-mobile-menu-container">
+          <button class="nhsuk-header__menu-toggle nhsuk-header__navigation-link" id="toggle-menu" aria-expanded="false">
+            <span class="nhsuk-u-visually-hidden">Browse</span>
+            More
+            <svg class="nhsuk-icon nhsuk-icon__chevron-down" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+              <path d="M15.5 12a1 1 0 0 1-.29.71l-5 5a1 1 0 0 1-1.42-1.42l4.3-4.29-4.3-4.29a1 1 0 0 1 1.42-1.42l5 5a1 1 0 0 1 .29.71z"></path>
+            </svg>
+          </button>
+        </li>
+      </ul>
+    </nav>
+  </div>
+{% endif -%}
 </header>
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diff --git a/tests/backstop/bitmaps_reference/nhsuk-frontend_Header_with_search_0_document_3_Surface_iPad_Pro.png b/tests/backstop/bitmaps_reference/nhsuk-frontend_Header_with_search_0_document_3_Surface_iPad_Pro.png
index 9d3be2a55..3069f4bbb 100644
Binary files a/tests/backstop/bitmaps_reference/nhsuk-frontend_Header_with_search_0_document_3_Surface_iPad_Pro.png and b/tests/backstop/bitmaps_reference/nhsuk-frontend_Header_with_search_0_document_3_Surface_iPad_Pro.png differ