From 1912 to 1922 further examples, slightly modified by Nigel Gresley, were built and designated 536 Class.

The LNER put the class to good use, with about twenty locomotives being allocated to the former Great Central network in 1923.

This is what led to them also being used on timed cross-country passenger trains from Grantham to Derby via Nottingham.

The arrival of the Thompson L1 Class Adriatic Tanks led to the J6s being taken off the Grantham to Derby services.

As a result of the 1955 Modernisation Plan, the J6s were withdrawn between 1955 and 1962, the last stand of the class being in the West Riding.