The Midland Railway 990 class was a class of 4-4-0steam locomotive with simple expansion. Ten were built by the Midland Railway in 1907–1909. They shared many features with the 1000 classcompounds. Initially built as saturated, from 1910 to 1914 they were equipped with superheated boilers. These locomotives were well-known for their work North of Leeds, over the demanding Settle and Carlisle route.