31 Jan New Tender and Boiler Improvements
In late March 1935, a new Stanier designed high capacity tender was fitted to 6201 to replace the original version. The new tender helped keep the coal trimmed forward. Later in 1935, 6201 received a revised boiler design with a 32 element Superheater, upgrading from the original 16 element Superheater as was originally fitted. It was after these key improvements had been made to the design that the LMS wanted to put the revisions to the test.