The North Eastern Railway (NER) Class Y (LNER Class A7) 4-6-2T tank locomotives were designed whilst Wilson Worsdell was Chief Mechanical Engineer, but none were built until 1910 by which time Vincent Raven had taken over.

[1] All twenty locomotives passed to the London and North Eastern Railway at the 1923 Grouping.

They also fitted ten more locomotives with the 160 lbf/in2 superheated boilers that the LNER classified as diagram 55.

By the time the A7s entered LNER ownership in 1923, the A7s had been relegated to shunting in the larger marshalling yards.

Heavy mineral traffic declined after the end of World War II, and the A7s moved to the Hull area, except for Nos.