Henderson added that the “important markers” on the blood check had come down since final Thursday however nonetheless point out that the horse has not absolutely recovered from the sickness.
He additionally stated that they’d not add additional stress to the horse with the intention to guarantee his enchancment.
“That is very unhappy for all of us however it’s in everyone’s greatest pursuits that we’ve got a match and wholesome Structure Hill to win again his crown subsequent 12 months,” the assertion continued.
AP McCoy known as Structure Hill “the horse of a era” after final 12 months’s win however he has solely raced as soon as this season.
That got here within the Christmas Hurdle at Kempton on Boxing Day the place he received simply below jockey Nico de Boinville, however he missed final month’s Cheltenham Trials Day over health considerations.
One other favorite has been dominated out of the Cheltenham Pageant, which begins on Tuesday 12 March.
Coach Barry Connell stated Marine Nationale will miss the Arkle Chase with a leg damage.
Evaluation – ‘There shall be different days’
Frank Keogh, BBC racing reporter
Racing’s huge will-he, received’t-he wait is over and it is unhealthy information for followers of the game that Structure Hill will miss its showpiece assembly subsequent week.
After pulverising the opposition final 12 months, his defence of the Champion Hurdle was keenly awaited, significantly as he has solely raced twice since.
It would inevitably take a number of the gloss off the assembly’s opening day subsequent Tuesday, and now final 12 months’s runner-up State Man is odds-on favorite to triumph for dominant Irish coach Willie Mullins.
Structure Hill’s coach Nicky Henderson has put the welfare of his horse first and saved punters nicely briefed on the scenario.
There shall be different days for this distinctive equine star.