LNWR Class E

26 were rebuilt by George Whale from Class B 4-cylinder compounds with the simple addition of a leading pony truck to reduce excessive front overhang between 1904 and 1908. The only alteration was to wheelbase and weight, but when the letter classification system was introduced in 1911, this took them into a different class. Two Class Es (No. 1038 in 1907 and No. 647 in 1908) were further rebuilt to Class Fs by replacing the 4 ft 3 in (130 cm) diameter boiler with a larger 5 ft 2 in (157 cm) diameter boiler.

From 1917, Charles Bowen Cooke started to rebuild the remaining 24 Class Es into LNWR Class G1 0-8-0s with simple expansion engines. 12 had been modified by the grouping of 1923, and a further pair were rebuilt in January and February of that year. Of the remaining ten Class Es, the LMS allocated them the numbers 9600-9. A further four were rebuilt to Class G1 in 1923-4, while the remaining six engines were withdrawn as Class Es in 1927/8, two of them never receiving their allocated LMS number. None were preserved.

LMS numbers in parentheses were not carried prior to rebuilding as G1 or withdrawal.