Mark, son of Mark Seymour Snr, founder of the Cantelupe Golf Club, which is the artisan section of Royal Ashdown and the second oldest artisan club in England.
1921 won Golf Illustrated Gold Vase as an amateur
1928 Sussex Professional Champion
1931 runner-up PGA Match Play Tournament
1932 played for England against Scotland and for Scotland (domiciled) against Ireland
1931, 1933, 1934 won Scottish Professional Championship
1935 - 1936 Czech Open Champion