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/python-data-pipeline-tools-2025.php

@@ -377,7 +377,7 @@ $breadcrumbs = [
                 <section class="article-cta">
                     <h2>Expert Data Pipeline Implementation</h2>
                     <p>Choosing and implementing the right data pipeline tools requires deep understanding of both technology capabilities and business requirements. UK Data Services provides comprehensive consulting services for data pipeline architecture, tool selection, and implementation to help organisations build robust, scalable data infrastructure.</p>
-                    <a href="/contact" class="cta-button">Get Pipeline Consultation</a>
+                    <a href="/#contact" class="cta-button">Get Pipeline Consultation</a>
                 </section>
             </div>