McCain keen to get practice into Overturn
(Healy Racing Photos)
The remarkable dual purpose performer made a scintillating start to his career over fences at Sandown last month but has swerved several subsequent engagements because of soft ground.
If he does run on Thursday he could potentially clash with Simonsig but the trainer is keen to get more experience into his charge ahead of the spring festivals.
"I'm desperate to run him. He's in at Kempton the day after Boxing Day and maybe we're getting to the stage where we have to go if it's good to soft with soft patches or even soft. I need to speak to his owner but we need to get the practice in. You can't go to the big days cold," the trainer told Racing UK.
Barry Geraghty has yet to make a decision about which of Henderson's two other runners, Finian's Rainbow and Riverside Theatre, he will ride in the William Hill King George VI Chase at Kempton on Boxing Day.