 Between 1905 and 1908 sixty were rebuilt as 4-4-0 tender engines.The first ten re-used the bogies from Class G16 4-4-0s, while the other re-used the rear bogie from withdrawn Class E10 0-4-4T locomotives.Superheaters began to be fitted from 1913, and all those still in service in 1926 had been so fitted.