Since their introduction in 1984, the Class 150 series of "Sprinter" Diesel Multiple Units have plied their trade across the UK—from Cornwall to Scotland and many places in between, they replaced large numbers of aging 1950s-built rolling stock. The backbone of many regional and rural services in the UK, the "Sprinters" are a common sight on the modern railway. This book takes a look at the 135-strong fleet and the routes they operate.