He was accepted , and started at the Royal Military Academy , Sandhurst , in January 1962 , graduating on 20 December 1963 .
Despite being advised by the headmaster at Stamford to consider university , Jackson applied to join the British Army in 1961 .
Jackson was accepted , and started at the Royal Military Academy , Sandhurst , in January 1962 , graduating on 20 December 1963 .
Despite being advised by the headmaster at Stamford to consider university , Jackson applied to join the British Army in 1961 .