diff --git a/_includes/footer.html b/_includes/footer.html
index 7a081b0e..1fd16b49 100644
--- a/_includes/footer.html
+++ b/_includes/footer.html
@@ -5,18 +5,18 @@
     <h4 class=band__title>Learn:</h4>
 
     <ul class="o-list-inline  o-list-inline--spaced  text-banner  mb0">
-      <li><a href="/2019/03/cache-control-for-civilians/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Understand <code>Cache-Control</code></a>
-      <li><a href="/2023/07/core-web-vitals-for-search-engine-optimisation/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Core Web Vitals and SEO</a>
-      <li><a href="/2018/11/css-and-network-performance/?utm_source=learn&utm_medium=internal&utm_campaign=learn">CSS Performance</a>
-      <li><a href="/2023/07/in-defence-of-domcontentloaded/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Does <code>DOMContentLoaded</code> Still Matter?</a>
-      <li><a href="/2021/02/measuring-network-performance-in-mobile-safari/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Improve Web Performance on iOS</a>
-      <li><a href="/2024/09/optimising-for-high-latency-environments/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Optimise for High Latency</a>
-      <li><a href="/2022/03/optimising-largest-contentful-paint/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Optimise Largest Contentful Paint</a>
-      <li><a href="/2020/05/the-fastest-google-fonts/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Speed Up Google Fonts</a>
-      <li><a href="/2023/10/the-three-c-concatenate-compress-cache/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Can We Drop Our Build Tools Yet?</a>
-      <li><a href="/2023/09/the-ultimate-lqip-lcp-technique/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Get the Fastest Possible LCP</a>
-      <li><a href="/2019/08/time-to-first-byte-what-it-is-and-why-it-matters/?utm_source=learn&utm_medium=internal&utm_campaign=learn">Diagnose Time to First Byte</a>
-      <li><a href="/2023/10/what-is-the-maximum-max-age/?utm_source=learn&utm_medium=internal&utm_campaign=learn">What Is the Maximum <code>max-age</code> Value?</a>
+      <li><a href="/2019/03/cache-control-for-civilians/">Understand <code>Cache-Control</code></a>
+      <li><a href="/2023/07/core-web-vitals-for-search-engine-optimisation/">Core Web Vitals and SEO</a>
+      <li><a href="/2018/11/css-and-network-performance/">CSS Performance</a>
+      <li><a href="/2023/07/in-defence-of-domcontentloaded/">Does <code>DOMContentLoaded</code> Still Matter?</a>
+      <li><a href="/2021/02/measuring-network-performance-in-mobile-safari/">Improve Web Performance on iOS</a>
+      <li><a href="/2024/09/optimising-for-high-latency-environments/">Optimise for High Latency</a>
+      <li><a href="/2022/03/optimising-largest-contentful-paint/">Optimise Largest Contentful Paint</a>
+      <li><a href="/2020/05/the-fastest-google-fonts/">Speed Up Google Fonts</a>
+      <li><a href="/2023/10/the-three-c-concatenate-compress-cache/">Can We Drop Our Build Tools Yet?</a>
+      <li><a href="/2023/09/the-ultimate-lqip-lcp-technique/">Get the Fastest Possible LCP</a>
+      <li><a href="/2019/08/time-to-first-byte-what-it-is-and-why-it-matters/">Diagnose Time to First Byte</a>
+      <li><a href="/2023/10/what-is-the-maximum-max-age/">What Is the Maximum <code>max-age</code> Value?</a>
     </ul>
 
   </div>
@@ -49,7 +49,7 @@ <h4 class=band__title>Learn:</h4>
                 <p>I specialise in large, product-based projects where performance, scalability, and maintainability are paramount.</p>
             </div
            ><div class="layout__item  lap-and-up-one-half">
-               <p><a href=/code-reviews/?utm_campaign=fix-it-fast&utm_source=footer&utm_medium=internal#fix-it-fast class="btn  btn--secondary  btn--full" data-sctrack=cta-footer>{% include cta.md %}</a></p>
+               <p><a href=/code-reviews/#fix-it-fast class="btn  btn--secondary  btn--full" data-sctrack=cta-footer>{% include cta.md %}</a></p>
             </div>
         </div>
 
diff --git a/_includes/nav.html b/_includes/nav.html
index 1ab10d57..b35ee422 100644
--- a/_includes/nav.html
+++ b/_includes/nav.html
@@ -18,11 +18,12 @@
     <li class="site-nav__item  has-sub-menu">
       <a href=/services/ class="site-nav__link  site-nav__services">Services</a>
       <ul class="site-nav__sub-menu">
-        <li class=site-nav__item><a href=/sentinel/     class="site-nav__sub-link site-nav__sentinel">Sentinel <sup style="text-transform: uppercase; font-size: 0.625rem; line-height: 1.2; color: #f43059;"><strong>New</strong></sup></a></li>
-        <li class=site-nav__item><a href=/workshops/    class="site-nav__sub-link site-nav__workshops">Workshops and Training</a></li>
-        <li class=site-nav__item><a href=/consultancy/  class="site-nav__sub-link site-nav__consultancy">Consultancy</a></li>
-        <li class=site-nav__item><a href=/code-reviews/ class="site-nav__sub-link site-nav__code-reviews">Performance Audits</a></li>
-        <li class=site-nav__item><a href=/downloads/    class="site-nav__sub-link site-nav__downloads">Downloads</a></li>
+        <li class=site-nav__item><a href=/masterclasses/ class="site-nav__sub-link site-nav__masterclasses">Masterclasses <sup style="text-transform: uppercase; font-size: 0.625rem; line-height: 1.2; color: #f43059;"><strong>New</strong></sup></a></li>
+        <li class=site-nav__item><a href=/sentinel/      class="site-nav__sub-link site-nav__sentinel">Sentinel</a></li>
+        <li class=site-nav__item><a href=/workshops/     class="site-nav__sub-link site-nav__workshops">Workshops and Training</a></li>
+        <li class=site-nav__item><a href=/consultancy/   class="site-nav__sub-link site-nav__consultancy">Consultancy</a></li>
+        <li class=site-nav__item><a href=/code-reviews/  class="site-nav__sub-link site-nav__code-reviews">Performance Audits</a></li>
+        <li class=site-nav__item><a href=/downloads/     class="site-nav__sub-link site-nav__downloads">Downloads</a></li>
       </ul>
     </li>
 
diff --git a/_includes/promo-home.html b/_includes/promo-home.html
index e5a5dc15..cb2293d0 100644
--- a/_includes/promo-home.html
+++ b/_includes/promo-home.html
@@ -33,9 +33,9 @@ <h2 class=heading>Training</h2>
 
       <li class=layout__item>
         <p class=promo__links>
-          <a href=/services/?utm_source=cta-promo-home class="btn btn--secondary">Learn more <span class=hide>about my services</span></a>
+          <a href=/services/ class="btn btn--secondary">Learn more <span class=hide>about my services</span></a>
           <span class=promo__links-spacer>or</span>
-          <a href=/contact/?utm_source=cta-promo-home class=btn>Hire me</a>
+          <a href=/contact/ class=btn>Hire me</a>
         </p>
 
     </ul>
diff --git a/_includes/promo.html b/_includes/promo.html
index 3424e1f7..43dfa79b 100644
--- a/_includes/promo.html
+++ b/_includes/promo.html
@@ -1,5 +1,5 @@
 <article class="[ box  box--highlight ]  [ flag  flag--responsive ]  mb" data-ui-component="Cross-sell promo">
-  <div class="flag__img"><a href="/contact/?utm_campaign=cta-article-promo" class="btn btn--full">Get in touch</a></div>
+  <div class="flag__img"><a href="/contact/" class="btn btn--full">Get in touch</a></div>
   <div class="flag__body">
     <span class="heading  mb0">Need Some Help?</span>
     <p>I help companies find and fix site-speed issues. <b>Performance audits</b>, <b>training</b>, <b>consultancy</b>, and more.</p>
diff --git a/_includes/ribbon.html b/_includes/ribbon.html
index 67c70d0f..caff422d 100644
--- a/_includes/ribbon.html
+++ b/_includes/ribbon.html
@@ -1,3 +1,3 @@
 <section class="c-highlight  c-highlight--small  c-highlight--ribbon">
-  <a href="/sentinel/?utm_source=ribbon&utm_medium=internal&utm_campaign=sentinel">Sentinel: Your Web-Performance Watchman</a>
+  <a href="/consultancy/#consultations">Book a Consultation</a>
 </section>
diff --git a/_includes/sub-content.html b/_includes/sub-content.html
index 1ec2f93d..c45abb0c 100644
--- a/_includes/sub-content.html
+++ b/_includes/sub-content.html
@@ -20,11 +20,11 @@
     href=https://web.archive.org/web/20190630140300/https://thenetawards.com/previous-winners/>award-winning</a>
   Consultant Web Performance Engineer</b>, <b>designer</b>, <b>developer</b>,
 <b>writer</b>, and <b>speaker</b> from the UK. I <b><a
-    href=/archive/?utm_source=sidebar&utm_medium=internal>write</a></b>, <b><a
+    href=/archive/>write</a></b>, <b><a
     href=https://twitter.com/csswizardry>Tweet</a></b>, <b><a
-href=/speaking/?utm_source=sidebar&utm_medium=internal>speak</a></b>, and <b><a
+href=/speaking/>speak</a></b>, and <b><a
 href=http://github.com/csswizardry>share code</a></b> about measuring and
-improving site-speed. You <a href=/services/?utm_source=sidebar&utm_medium=internal>should hire me</a>.</p>
+improving site-speed. You <a href=/services/>should hire me</a>.</p>
 
 <p><a href=https://twitter.com/csswizardry class=twitter-follow-button data-show-count=true data-lang=en>Follow @csswizardry</a></p>
 
@@ -33,7 +33,7 @@
 <hr>
 
 <p class=text-banner>
-  <a href=/code-reviews/?utm_source=sidebar&utm_medium=internal#fix-it-fast class="btn  btn--full btn--positive" id=cta data-sctrack=cta-sidebar elementtiming=cta-sidebar>{% include cta.md %}</a>
+  <a href=/code-reviews/#fix-it-fast class="btn  btn--full btn--positive" id=cta data-sctrack=cta-sidebar elementtiming=cta-sidebar>{% include cta.md %}</a>
 </p>
 
 <script>
diff --git a/_layouts/post.html b/_layouts/post.html
index 63912dac..b2638ea5 100644
--- a/_layouts/post.html
+++ b/_layouts/post.html
@@ -161,10 +161,10 @@ <h5 class=mb0 style="font-weight: bold;">By Harry Roberts</h5>
                 "source": "list",
                 "urls": [
                   {% if page.next.url %}
-                    "{{ page.next.url }}?utm_source=pagination&utm_medium=internal",
+                    "{{ page.next.url }}",
                   {% endif %}
                   {% if page.previous.url %}
-                    "{{ page.previous.url }}?utm_source=pagination&utm_medium=internal"
+                    "{{ page.previous.url }}"
                   {% endif %}
                 ]
               }
@@ -175,10 +175,10 @@ <h5 class=mb0 style="font-weight: bold;">By Harry Roberts</h5>
 
         <nav class=c-pagination>
           {% if page.previous.url %}
-            <a href="{{ page.previous.url }}?utm_source=pagination&utm_medium=internal" class="c-pagination__item c-pagination__prev" style="view-transition-name: x-{{ page.previous.date | date: '%Y-%m-%d' }}" id=articleOlder>{{page.previous.title}}</a>
+            <a href="{{ page.previous.url }}" class="c-pagination__item c-pagination__prev" style="view-transition-name: x-{{ page.previous.date | date: '%Y-%m-%d' }}" id=articleOlder>{{page.previous.title}}</a>
           {% endif %}
           {% if page.next.url %}
-            <a href="{{ page.next.url }}?utm_source=pagination&utm_medium=internal" class="c-pagination__item c-pagination__next" style="view-transition-name: x-{{ page.next.date | date: '%Y-%m-%d' }}" id=articleNewer>{{page.next.title}}</a>
+            <a href="{{ page.next.url }}" class="c-pagination__item c-pagination__next" style="view-transition-name: x-{{ page.next.date | date: '%Y-%m-%d' }}" id=articleNewer>{{page.next.title}}</a>
           {% endif %}
         </nav>
 
@@ -214,7 +214,7 @@ <h5 class=mb0 style="font-weight: bold;">By Harry Roberts</h5>
             <hr />
 
             <p>
-                <a href=/code-reviews/?utm_source=post-footer&utm_medium=internal&utm_campaign=fix-it-fast#fix-it-fast class="btn btn--full">Did this help? <strong>We can do way more!</strong></a>
+                <a href=/code-reviews/#fix-it-fast class="btn btn--full">Did this help? <strong>We can do way more!</strong></a>
             </p>
         {% endif %}