 Withdrawals in this period averaged eight cars per year; fewer in the period 1967-1972 as the Hitachi fleet was designed and introduced into service, but many more either side of that period.The last two in service, withdrawn during the first half of 1974, were 76BT and 80T.The carriages converted from steam to electric then back to steam but which did not return to electric later on - 54B, 64B, 66B, 164B, 166B, 167B and 170B - were withdrawn largely in line with others of that class.