The locomotive was rebuilt by the original builders in the early 1930s.

Between June and December 1894 the 28 remaining locomotives of the 3001 class were rebuilt.

The locomotive was rebuilt by Sentinel with a larger boiler in 1927.

In addition, 278 older locomotives were rebuilt to the G1 specification between 1917 and 1934.

It was relatively inefficient, and the locomotives used in this trial were rebuilt to the normal configuration.

The experiment was unsuccessful and the locomotives were rebuilt to 2-10-2s during 1915-1918.

Both locomotives were rebuilt, and the 223's tender tank was replaced in April of the same year.

It's planned that in the coming years, when finances permit, the locomotive will be rebuilt and returned to service.

In the event, only one locomotive, number 79A, was rebuilt.

During 2009-2010 4 locomotives were rebuilt to class ST45.