The "Black Five" refers to a class of steam locomotives built by the London, Midland and Scottish Railway (LMS) in the 1930s. Officially known as the LMS Class 5, these engines were designed for mixed-traffic use, meaning they could haul both passenger and freight trains. Their powerful design made them versatile and reliable, contributing to their popularity during the steam era. The name "Black Five" comes from their black livery and the classification number assigned by the LMS. A total of 842 units were produced, and they became iconic in British railway history. Many have been preserved and are still in operation today, showcasing the engineering excellence of the time.