sentences:  Sanders was one of Britain's most successful flat race jockeys for several years, riding over 100 winners every year from 2002 to 2010.In the 2007 championship season Seb Sanders shared the British flat racing Champion Jockey's title with Jamie Spencer.On the final day of a thrilling season at Doncaster their seasonal totals finished level at 190-190, when Spencer won the very last race of the season.