The Class 50 is a type of diesel-electric locomotive that was built in the United Kingdom during the 1960s and 1970s. Designed for high-speed passenger and freight services, these locomotives are known for their distinctive appearance and powerful performance. They were primarily used by British Rail and have a maximum speed of around 90 miles per hour. With a total of 50 units produced, the Class 50 locomotives feature a unique design that includes a large front cab and a characteristic "bulldog" nose. Many of these locomotives have been preserved and are still in operation today, often seen at heritage railways and special events across the UK.