They all passed to the London and North Eastern Railway at the 1923 grouping and received the classification F7.
In 1924, 8307 was also push-pull fitted using the mechanical system for use on the Great Central section; no extra pump was needed, but it did gain a vacuum ejector.
[2] All had survived to pass to the LNER in 1923; the first retirement started in 1931 when four were withdrawn.
The locomotives had large cabs, with large spectacle plate front and rear, which earned the nickname "Crystal Palace tanks"; those in Scotland were nicknamed "Tomato houses".
[2] Two locomotives lasted long enough to be renumbered in the 1946 scheme; they became the property of British Railways in 1948, but both were withdrawn the same year without receiving their BR number.