 26D and 9D followed in 1956 and 1957 respectively, and withdrawals of the Swingdoor fleet accelerated from there.18D and 22D were removed from service in 1962, and the next year took 4, 8, 10, 13, 20, 23 and 30.3 and 5 in 1964, 7 and 11 in 1965, 14D in 1966 and 28D in 1967, then a short reprieve.