All change for the 2017 Blenheim Palace International Horse Trials The 2017 Blenheim Palace International Horse Trials will take place a week later than usual in 2017 (13-17 September), and will be held over five days instead of four. Event Director Mandy Hervieu explains: “The date change is due to the fact that for many years three of the bigger international horse trials (Blair Castle, Burghley and Blenheim Palace) have been on consecutive weekends, which puts pressure on many of the events’ stakeholders, in addition to there being a very…