Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
A total of 69 locomotives was produced and these passed to the London, Midland and Scottish Railway (LMS) in 1923. The LMS gave them the power classification 6F and numbered them as follows:
Rebuilds, 12771-12800
New locos, 12801-12839
In 1948, British Railways (BR) inherited 11 locomotives and numbered them in the range 52782-52839.
Withdrawal
The first locomotive was withdrawn in 1927 and the last in 1951. None were preserved.
References
Ian Allan ABC of British Railways Locomotives; part 3 (1948 ed.). p. 44.
Casserley, H.C.; Johnston, S.W. (1966). Locomotives at the Grouping, no.3, LMS. Ian Allan. p. 129.