Nicky Henderson has announced Mark Walsh will ride Jonbon for the first time in Saturday’s bet365 Celebration Chase at Sandown, while James Bowen is in line to partner Constitution Hill if he is given the “double green light” to run at the Punchestown Festival next week.

With stable jockey Nico de Boinville sidelined by injury, the Seven Barrows handler is having to make alternative riding arrangements for his two stable stars.