The 12-year-old was having the final start of his glittering career in the Cheltenham Festival highlight, with owners Cheveley Park Stud having confirmed he would retire following his run in the blue riband – his eighth appearance in all at the Festival.

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Four days of top-class jumps racing starts on Tuesday with Champion Hurdle highlight.

The victim, a man in his 50s, was taken to Southmead Hospital in Bristol.