The 22nd Chief Cashier, Leslie Kenneth O'Brien was born on 8 February 1908 and entered Bank service in 1927. He was appointed Deputy Chief Cashier in 1951 and was Chief Cashier from 17 January 1955 until 28 February 1962. He rose through Executive Director and Deputy Governor to become Governor from 1966-73. He was knighted in 1967 and became Lord O'Brien of Lothbury in 1973.