Cylinder design and valve events were not optimal, so the Claughton Class was a mediocre performer on the track.

[4] Twenty were rebuilt by the LMS with larger boilers, and ten of these had Caprotti valve gear.

Twelve others were rebuilt as the initial engines of the Patriot Class, though not much material was reused.

With the introduction of the LMS Royal Scot Class in 1927, the Claughtons' main work had been taken away and many were transferred to the Midland Division.

6004, which was regularly used to haul fitted freight trains between London and Edge Hill, becoming increasingly dirty.