 After the First World War, the class were increasing more at the countryside end of the system in their operating scope.The locomotives passed to the Southern Railway (SR) in 1923.They were soon seeing new changes, as 10 members of the class were moved to London Bridge to act as carriage shunters, while from 1931 the repairs and overhauls of the class were undertaken at Ashford works rather than at Brighton, after the latter works was mothballed.