At Grouping (1923), the LNER inherited 4-4-0s from all of its major constituents, a distinction shared only with the 0-6-0T. With 920 examples, it was the most numerous tender type after the 0-6-0, amounting to 12% of the total stock.

The NBR J Class (LNER Classes D29 & D30), commonly known as the Scott class, were a class of 4-4-0 steam tender locomotives designed by William P. Reid for the North British Railway. They passed to the London and North Eastern Railway at the grouping in 1923.

SR departmental locomotives are the locomotives of departmental (non-revenue earning) stock originally introduced by the Southern Railway. Both departmental locomotives and carriages were numbered in a series commencing at 1S.

The LNER divided the NBR K class into four classes, as below. It was common practice for the North British Railway to assign similar engines to the same class group, whereas the LNER system allowed only identical engines to bear the same class designation.

The initial two prototypes (LNER D30/1) were followed by twenty five production locomotives (LNER D30/2) built in three batches between 1914 and 1920. These engines replaced the 18 element Schmidt superheater with a 24 element Robinson superheater.

Classified "Class D2" by the GNR, they were also known as the "400" class after the prototype, and would be reclassified as D4 by the LNER. No. 400 was built in 1896 and was followed by fifty more D2s in five batches over the next three years.

These were the first brand new locomotives that the LNER allocated to this shed. During the 1930s, the D49s typically hauled seven to ten coach trains on moderate length (50-100 mile) journeys.

400 (LNER No. 9400) THE DOUGAL CRATUR Built: NBR Cowlairs Works. To traffic, allocated to St. Margarets: September 1912. Renumbered 9400: 31st December, 1924. Reallocated to Hawick: 20th April, 1942. Withdrawn: 14th June, 1945. Scrapped at LNER Cowlairs Works.

Sturrock 400 Class 0-6-0 Ivatt J3 (with 24″ stroke cyls) or J2 (26″). The engines gradually received Stirling boilers, initially 4′-0½” diam. then 4′-2½” after 1878.

The London and North Eastern Railway (LNER) Class J39 was a medium powered 0-6-0 steam locomotive designed for mixed traffic work throughout the former LNER system between London and the north of Scotland. The class was introduced by Nigel Gresley.