Sir William Stanier was a prominent British locomotive engineer known for his work with the London, Midland and Scottish Railway (LMS). Born in 1876, he played a significant role in the design and development of steam locomotives during the early 20th century. His innovative designs, such as the Stanier Black Five and Princess Coronation classes, greatly improved efficiency and performance in railway transport. Stanier's contributions to railway engineering earned him recognition, and he was knighted in 1945 for his services. He continued to influence locomotive design until his retirement in 1949, leaving a lasting legacy in the world of railways.