The LNER A1 Class is a type of steam locomotive designed for the London and North Eastern Railway (LNER) in the 1920s. Built for high-speed passenger services, these locomotives were known for their powerful performance and distinctive streamlined design. The A1 Class was capable of reaching speeds of up to 100 miles per hour, making them some of the fastest trains of their time. The first locomotive of this class, named Flying Scotsman, was completed in 1923 and became an iconic symbol of British rail travel. A total of 49 A1 locomotives were built, and they played a significant role in the development of modern steam technology, influencing future designs in the railway industry.