Explore refactoring techniques using Symfony components in this PHP UK Conference 2013 talk by Michael Peacock. Learn how to leverage standalone implementations of common website features to improve large applications without rewriting them from scratch. Discover real-world examples from refactoring a high-traffic news website, including the use of Swift Mailer, Twig, caching, dependency injection, XML parsing, and event dispatching. Gain insights into handling business logic, legacy apps, and project size challenges. Understand the benefits of using Symfony components for gradual improvements, new feature implementation, and deployment strategies. Examine functional testing approaches and common gotchas encountered during the refactoring process.