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/real-time-analytics-streaming-data.php

@@ -634,7 +634,7 @@ groups:
                 <section class="article-cta">
                     <h2>Build Real-Time Analytics Capabilities</h2>
                     <p>Implementing real-time analytics for streaming data requires expertise in distributed systems, stream processing frameworks, and modern data architectures. UK Data Services provides comprehensive consulting and implementation services to help organizations build scalable, low-latency analytics platforms that deliver immediate business value.</p>
-                    <a href="/contact" class="cta-button">Start Your Real-Time Analytics Project</a>
+                    <a href="/#contact" class="cta-button">Start Your Real-Time Analytics Project</a>
                 </section>
             </div>