The news has been confirmed by trainer Nicky Henderson
Trainer Nicky Henderson has confirmed that Clane's Mark Walsh will ride Jonbon in Saturday's Celebration Chase at Sandown.
With Henderson's retained jockey Nico de Boinville out injured, James Bowen is in line to partner Constitution Hill at the Punchestown Festival.
The trainer says he'll make a final decision on whether to bring Constitution Hill to Ireland after a gallop this Friday.

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