Derek Moncrieffe Leslie was born at Melton Mowbray on April 17, 1929, and rode his first winner, Just Joe, at Devon on September 15, 1949.
He rode a total of 173 winners.
He retired in 1961 and, in 1967, turned to training.
Derek married twice and became a Jehovah's Witness.
He died of motor neurone disease on November 20, 1988, aged 59.
Derek was cremated. He left £136,336.Derek Leslie
1951: Stayers' Handicap Chase - Pearly Prince
1956: November Handicap Hurdle - Peggy Jones
1957: Tote Investors Handicap Chase - Chateau Pavie
1957: November Handicap Hurdle -Bandalore
1959: County Handicap Hurdle - Approval