A total of 21 2-year-olds who are graduates of last year's Tattersalls Book 1 yearlings sale have added a £10,000 Plus 10 bonus to their £25,000 Book 1 Bonus earnings this year. Plus 10 graduates of the Tattersalls Book 1 yearling sale of 2015 have amassed almost £750,000 worth of extra prize money thanks to the two schemes. By the end of 2016, it is anticipated that Plus 10-qualified Book 1 graduates will have had more than 320 opportunities to win an extra £35,000. Buyers at this year's Book 1,...