2025 I Am Maximus Aintree Aintree Festival Willie Mullins 2025 Event JP McManus Horse Performance Trainer Insights Race Predictions Historical Context Aintree Hurdle 2025 Race Details Sweepstake Winners Runners Trainers Race Preparation Betting Attendance Trends Aintree Meeting Betting Offers Historical Winners Safety Measures Historical Changes Audience Engagement Technology in Racing Perceval Legallois Minella Cocooner Senior Chief Three Card Brag Irish Runners 2025 Race Nick Rockett Patrick Mullins Emotional Significance 2025 Grand National Horse Profiles Aintree Racecourse