SEO: BreadcrumbList on all service pages, author bios, case study pages, internal links, address fix, llms.txt update

services/data-analysis-services.php

@@ -7,6 +7,18 @@ $page_robots = "index, follow";
 
 include($_SERVER['DOCUMENT_ROOT'] . '/includes/header.php');
 ?>
+<script type="application/ld+json">
+{
+    "@context": "https://schema.org",
+    "@type": "BreadcrumbList",
+    "itemListElement": [
+        {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://ukdataservices.co.uk/"},
+        {"@type": "ListItem", "position": 2, "name": "Services", "item": "https://ukdataservices.co.uk/#services"},
+        {"@type": "ListItem", "position": 3, "name": "Data Analysis Services", "item": "https://ukdataservices.co.uk/services/data-analysis-services"}
+    ]
+}
+</script><?php
+?>
 
 <div class="container py-5">
     <div class="row">