[1] Further modifications to the design resulted in the Atbara Class entering service in 1900, the names for these locomotives generally being taken from contemporary military engagements or senior army commanders.

The final batch of locomotives were named after varieties of garden plant and in consequence were known as the Flower Class.

3292, was completed in December 1897 with a domed parallel boiler, a raised Belpaire firebox and an extended, built-up smokebox similar to that used on the Duke Class.

3310 Waterford, was fitted with a domeless parallel boiler, a steel Belpaire firebox, and an enlarged cab.

[5][6] The class were fitted with a steam chest and slide valves located beneath the cylinders.

[7] This inverted arrangement of slide valves and steam chest, originally introduced by William Stroudley of the LB&SCR, allowed the valves to drop away from the cylinder's steam port faces when the regulator was closed, thus reducing wear.

This arrangement allowed the valve rods to be driven directly from the expansion link.

According to Stroudley, the axleboxes, bearing surfaces, hornblocks and coupling rods of locomotives with outside cylinders had a service life twice as long as those on inside-cylindered examples.

[5] The Badmintons had massive crescent-shaped balancing weights, which made the unmounted pairs of wheels difficult to handle in the workshop.

Churchward's Chief Assistant, F.G. Wright, designed a large boiler with a very deep firebox, which was fitted to no.

[13] The boiler was designed to hold a large volume of hot water, forming a reservoir to assist the locomotive running along an undulating line.

3297 was also fitted with a large cab with two side windows, reminiscent of North Eastern practice.

[19] These straight frames were less prone to fracturing, because of the greater depth of plate between the coupled wheels.

[27] The Armstrong Class were a group of four locomotives designed by William Dean and built in 1894 with 7 ft 1.5 in (2.172 m) driving wheels.

16 Brunel was rebuilt with 6 ft 8.5 in (2.045 m) wheels and piston valves, having already been fitted with a Standard No.2 boiler.