They passed to the London and North Eastern Railway at the grouping in 1923 and received the LNER classification J16.

1189 was built instead with a Belpaire firebox, being the first Great Eastern locomotive to be so fitted.

[2] The experiment was a success and a further thirty locomotives constructed later were fitted with Belpaire fireboxes and termed the G58 class.

From 1921, all the round-top boilers were replaced by the Belpaire type, the majority being superheated.

The remaining forty-three were reboilered by the London and North Eastern Railway and were re-classified J17.