Worsdell had 20 class M1 locomotives built from 1892, which, unlike previous express locomotives, did not have a compound engine. From 1896, 30 more of the class Q followed, which had a smaller boiler and slightly larger cylinders. With their more than seven-foot wheels, they were used in front of the fastest trains. At the LNER they became classes D17/1 and D17/2. Most were retired by 1945. Only two D17/2s came to British Railways and were retired in February 1948. 