The spring preparation of Most Joyful will get off to a belated start on Monday when the filly runs in a Hawkesbury barrier trial for new trainer Tony McEvoy.

The three-year-old was among a group of horses sent to McEvoy after her owner John Singleton took his team away from Gai Waterhouse after a public spat with the trainer over her handling of More Joyous.

Most Joyful is a full sister to the now-retired More Joyous, an eight-time Group One winner who is in England waiting to be served by champion Frankel.

McEvoy, who has established a base at Hawkesbury to complement his South Australian operation, had hoped to have Most Joyful up and running by now but a cold put paid to that.

"She was due to trial at the beginning of the month but she had a couple of setbacks," McEvoy said.

"They are not soundness issues but she just had a bit of a respiratory problem which cost me a couple of weeks with her.

"She is a lovely filly and I'm hoping we can get the best out of her."

Most Joyful was unplaced in her two juvenile starts in the Widden Stakes and the Sweet Embrace.

McEvoy has also inherited Slayman, a Zabeel half-brother to another multiple Group One winner Mosheen.

The colt had two starts for Paul Perry and is also scheduled to trial at Hawkesbury.

The Clarry Conners-trained Victorian Oaks winner Dear Demi, another Singleton-owned horse, is down to run in a 1000m trial ahead of her season return which is likely to be in Melbourne.

Photon Willie will also make an appearance at the Hawkesbury trial session after stewards ordered him back for further education following his last-start win at Rosehill.

"He will be among my runners for the Premier's Cup on Saturday but he has to get through the trial first," trainer Chris Waller said.

Photon Willie won a 1500m race at Rosehill on August 17 but did his best to throw it away, ducking away from Glyn Schofield's whip near the line.