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>

services/data-cleaning.php

@@ -476,25 +476,36 @@ $keywords = "data cleaning UK, data validation, duplicate removal, data standard
                 </div>
                 
                 <div class="footer-section">
-                    <h3>Data Services</h3>
+                    <h3>Our Services</h3>
                     <ul>
+                        <li><a href="/services/competitive-intelligence">Competitive Intelligence</a></li>
+                        <li><a href="/services/price-monitoring">Price Monitoring</a></li>
                         <li><a href="/services/data-cleaning">Data Cleaning</a></li>
-                        <li><a href="/services/business-intelligence">Business Intelligence</a></li>
-                        <li><a href="/services/data-migration">Data Migration</a></li>
-                        <li><a href="/services/web-scraping">Web Scraping</a></li>
+                        <li><a href="/#services">All Services</a></li>
                     </ul>
                 </div>
-                
+
                 <div class="footer-section">
-                    <h3>Company</h3>
+                    <h3>Locations</h3>
                     <ul>
-                        <li><a href="/about">About Us</a></li>
-                        <li><a href="/case-studies/">Case Studies</a></li>
-                        <li><a href="/blog/">Blog</a></li>
-                        <li><a href="/#contact">Contact</a></li>
+                        <li><a href="/locations/london">London</a></li>
+                        <li><a href="/locations/manchester">Manchester</a></li>
+                        <li><a href="/locations/birmingham">Birmingham</a></li>
                     </ul>
                 </div>
-                
+
+                <div class="footer-section">
+                    <h3>Resources & Insights</h3>
+                    <ul>
+                        <li><a href="/blog/">Data Intelligence Blog</a></li>
+                        <li><a href="/case-studies/">Case Studies</a></li>
+                        <li><a href="/about">About UK Data Services</a></li>
+                        <li><a href="/project-types">Project Types</a></li>
+                        <li><a href="/faq">FAQ</a></li>
+                        <li><a href="/quote">Request Consultation</a></li>
+                    </ul>
+                </div>
+
                 <div class="footer-section">
                     <h3>Legal</h3>
                     <ul>