Three runners undergoing veterinary assessment following National Three runners in the Randox Grand National were reported to be undergoing veterinary assessment after failing to finish. The Willie Mullins-trained Quai De Bourbon fell at the second fence in the four-and-a-quarter-mile contest, while Sara Bradstock’s Mr Vango came down at the sixth obstacle, with both horses transported back to the stables via horse ambulance. Top Of The Bill, who is trained by Nigel and Willy Twiston-Davies and was partnered by Ginger McCain’s grandson Toby McCain-Mitchell, fell at the last and while he remained on the ground for a short spell, he was later seen being walked back in. A statement from the track said: “Top Of The Bill fell at the final fence and was assessed on course. He was walked back to the stables where he will remain under assessment. “Quai De Bourbon walked onto the horse ambulance, having been assessed, following his fall at the second fence and has returned to the stables for further assessment. “Mr Vango walked onto the horse ambulance following his fall at the sixth fence, having been assessed, and has returned to the stables for further assessment. The Gordon Elliott-trained Stellar Story fell at the 19th fence and his rider Robbie Dunne was taken to hospital for further treatment. Aintree’s statement added: “Jockey Robbie Dunne was assessed on course by the medical team. He is conscious and talking and is being taken to hospital for further assessment. “All remaining horses and riders are accounted for.” There was an equine fatality earlier in the day when Get On George had to be euthanised after sustaining an injury on the flat in the William Hill Handicap Hurdle.