Constitution Hill fell for the second time in succession as Lossiemouth landed the William Hill Aintree Hurdle.
The Nicky Henderson-trained favourite suffered a shock departure in the Champion Hurdle at Cheltenham last month but it looked as though he was travelling supremely well for Nico de Boinville turning for home this time, although he was stuck in behind a wall of horses.
As De Boinville switched out to launch his challenge, Constitution Hill once again got his jumping all wrong and hit the turf, leaving Lossiemouth (5-4) and Wodhooh to battle it out, with the first-named just prevailing for Willie Mullins.
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"Two and a half miles was ideal for her here, the race was ideal for her," winning jockey Paul Townend told ITV.
"The ground was lively enough, it's drying out every minute compared to how it was riding on the hurdles course earlier.
"She coped with it well. I've seen Nico walking away, and Constitution Hill, so we can celebrate that."