was taken to hospital for further assessment following a fall at
on Monday.
De Boinville was aboard 3-1 favourite As The Fella Says for Nicky Henderson in the fourth race on the card, the Southern Cranes Novices’ Handicap Hurdle, when falling at the first.
The hurdle was bypassed subsequently, with De Boinville treated on the track before being taken to Royal Sussex County Hospital in Brighton.
De Boinville – who was reported by Sky Sports Racing to be conscious – is due to have a big end to the season, with Jonbon set to run at Sandown on Saturday and the potential of Constitution Hill starring at next month’s Punchestown Festival.