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>

blog/articles/manufacturing-data-transformation.php

@@ -326,7 +326,7 @@ $breadcrumbs = [
                 <section class="article-cta">
                     <h2>Manufacturing Data Transformation Services</h2>
                     <p>Implementing Industry 4.0 and manufacturing data transformation requires expertise in both operational technology and data analytics. UK Data Services provides comprehensive support for IoT integration, predictive analytics implementation, and digital transformation strategy to help manufacturers realise the full potential of their data assets.</p>
-                    <a href="/contact" class="cta-button">Start Your Transformation</a>
+                    <a href="/#contact" class="cta-button">Start Your Transformation</a>
                 </section>
             </div>