diff --git a/js/lib.main.js b/js/lib.main.js
index abdd41b..e6f2225 100644
--- a/js/lib.main.js
+++ b/js/lib.main.js
@@ -1,6 +1,6 @@
 /* eslint-disable no-unused-vars */
 /* All Page Init */
-const version = '2023.5.10'
+const version = '2023.6.1'
 
 /* Feature Detectors */
 
diff --git a/js/pis.js b/js/pis.js
index 004a511..fd524bd 100644
--- a/js/pis.js
+++ b/js/pis.js
@@ -23,6 +23,12 @@ async function findByOrigDest() {
   hideLoading()
 }
 
+async function findByHeadcode() {
+  showLoading()
+  const formData = await fetchHeadcode()
+  window.location.assign(`./train-detail.html?headcode=${formData}`)
+}
+
 async function findByPisCode() {
   showLoading()
   const formData = await fetchPisCode()
@@ -72,6 +78,10 @@ async function fetchPisCode() {
   return document.getElementById('pis').value
 }
 
+async function fetchHeadcode() {
+  return document.getElementById('headcode').value
+}
+
 async function insertData(json) {
   // Receives the JSON Respose ([{},{}]) containing one or more possible
   // PIS codes.  Display the code and the stops with a method of scrolling between them.
diff --git a/pis.html b/pis.html
index c383874..328609e 100644
--- a/pis.html
+++ b/pis.html
@@ -45,6 +45,16 @@
     <div id="crs-box">
         <p>Currently supported (Beta): GWR: ex-Wessex, HEx<br>Duplicate stopping patterns have been removed.</p>
         <p id="auth-required">You need to be logged into a free <a href="./settings.html#railstaff">rail staff version</a> account for this feature.</p>
+        <h3>Search by Headcode</h3>
+        <form action="javascript:findByHeadcode();">
+          <div id="crs-inputs">
+            <div class="crs-input">
+              <label for="pis">PIS Code:</label><br>
+              <input type="text" class="small-lookup-box pis-input" id="headcode" name="headcode" maxlength="4" autocomplete="off"><br><br>
+            </div>
+          </div>
+          <button type="submit" value="Find" class="lookup-button">Submit</button>
+        </form>
         <h3>Search by CRS Codes</h3>  
           <form action="javascript:findByOrigDest();">
             <div id="crs-inputs">
diff --git a/styles/train-detail.css b/styles/train-detail.css
index c17be98..742d091 100644
--- a/styles/train-detail.css
+++ b/styles/train-detail.css
@@ -4,6 +4,16 @@
     padding-bottom: 0;
 }
 
+.service_button {
+    font-size: 15px;
+    color: white;
+    background-color: var(--accent-color);
+    border: none;
+    border-radius: 30px;
+    padding: 10px;
+    margin: 5px;
+}
+
 #data_headcode {
     color: var(--second-text-color);
     font-size: 25px;
diff --git a/sw.js b/sw.js
index d137b65..a83e4fb 100644
--- a/sw.js
+++ b/sw.js
@@ -1,6 +1,6 @@
 /* Service Worker */
 
-const swVersion = '2023.5.10-1'
+const swVersion = '2023.6.1-1'
 const cacheName = `owlboard-${swVersion}`
 const cacheIDs = [cacheName]
 let staticCache = [
@@ -34,8 +34,9 @@ const dynamicCache = [
   '/find-code.html',
   '/settings.html',
   '/pis.html',
-  'stats.html',
-  'registered.html',
+  '/stats.html',
+  '/registered.html',
+  '/train-detail.html',
   '/manifest.json',
   '/styles/board.css',
   '/styles/find-code.css',
@@ -45,6 +46,7 @@ const dynamicCache = [
   '/styles/settings.css',
   '/styles/pis.css',
   '/styles/stats.css',
+  '/styles/train-detail.css',
   '/js/find-code.js',
   '/js/index.js',
   '/js/issue.js',
@@ -55,7 +57,8 @@ const dynamicCache = [
   '/js/simple-board.js',
   '/js/pis.js',
   '/js/stats.js',
-  '/js/registered.js'
+  '/js/registered.js',
+  '/js/train-detail.js'
 ]
 
 for(let i = 0; i < dynamicCache.length; i++) {