During World War I, seven of them were loaned to the Caledonian Railway. They were modified to have shorter chimneys. In 1921, 10 were sent to Barrow-in-Furness to undergo repairs.
London and North Eastern Railway
The locomotives passed to the London and North Eastern Railway (LNER) in 1923. The LNER classified them as J10 with sub-classes J10/1 to J10/6 because of detail differences. Withdrawals began in 1933, but were rather slow.
British Railways
Some 78 locomotives survived into British Railways (BR) ownership in 1948 as follows:
J10/2, 4
J10/4, 38
J10/6, 36
BR numbers were 65126–65209 (with gaps). In the 1950s, some of them were sent to work at sheds once belonged to the LMS, the L&YR, and the LNWR. They were also reported to be popular with ex-LMS employees. All locomotives had been withdrawn by 1961 with the last one in service No. 65157 going in August 1961. None were preserved.
Fry, E. V., ed. (September 1966). Locomotives of the L.N.E.R., Part 5: Tender Engines—Classes J1 to J37. Kenilworth: RCTS. pp.53–62. ISBN0-901115-12-6.