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 1904-1908.
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 of Class Es were further rebuilt to Class Fs by the replacement of the 4'3" diameter boiler with a larger 5'2" diameter boiler; these being 1038 in 1907 and 647 in 1908.

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 so treated by the grouping of 1923, and a further pair were treated 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 A further four were rebuilt to Class G1 in 1923-4, while the remaining six engines were withdrawn still as Class Es in 1927/8, two of them never receiving their allocated LMS No.
 None was preserved.
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 1904-1908. 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 of Class Es were further rebuilt to Class Fs by the replacement of the 4'3" diameter boiler with a larger 5'2" diameter boiler; these being 1038 in 1907 and 647 in 1908.
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 so treated by the grouping of 1923, and a further pair were treated 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  A further four were rebuilt to Class G1 in 1923-4, while the remaining six engines were withdrawn still as Class Es in 1927/8, two of them never receiving their allocated LMS No.  None was preserved.
LNWR Class E