The son of The Reverend Ralph Leycester and Susanna Hanmer, he was born at in July 1763 at Simpson, Buckinghamshire.
[3] A student Lincoln's Inn, he was called to the bar in the same year that he gained his master's degree.
[4] Leycester was mainly associated with Surrey and the MCC, but also represented Hampshire, amongst other teams.
[5] He was an occasional patron of cricket, his own team appearing in a first-class match in 1802.
[8] Leycester died at his Portland Place residence in October 1838; he was survived by his widow, Charlotte Jemima.