Wire all pages to navigation and fix broken links

- Add services, locations, and resources to footer navigation across all pages
- Update footer in 22+ files with consistent navigation structure
- Add service pages: competitive-intelligence, price-monitoring, data-cleaning
- Add location pages: london, manchester, birmingham
- Update all sitemaps (sitemap.php, sitemap.xml, sitemap-services.xml, sitemap-index.xml)
- Fix broken /contact links (changed to /#contact)
- Fix broken contact.php references (changed to /quote)
- Fix faq-enhanced.php with correct service links
- Fix london.php file permissions (600 -> 644)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

sitemap.xml

@@ -183,21 +183,21 @@
 <!-- Location Pages -->
 <url>
     <loc>https://ukdataservices.co.uk/locations/london.php</loc>
-    <lastmod>2025-12-07T12:00:00+00:00</lastmod>
+    <lastmod>2025-12-08T12:00:00+00:00</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
 </url>
 
 <url>
     <loc>https://ukdataservices.co.uk/locations/manchester.php</loc>
-    <lastmod>2025-12-07T12:00:00+00:00</lastmod>
+    <lastmod>2025-12-08T12:00:00+00:00</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
 </url>
 
 <url>
     <loc>https://ukdataservices.co.uk/locations/birmingham.php</loc>
-    <lastmod>2025-12-07T12:00:00+00:00</lastmod>
+    <lastmod>2025-12-08T12:00:00+00:00</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
 </url>