Jockeys are banned from using mobile phones at the racetrack but stewards made a supervised exception for James McDonald at Canterbury on Wednesday.

Offered the mount on star Singapore galloper Spalato in a Group Two race in Hong Kong this Sunday, McDonald was allowed - under the strict watch of stewards - to make a few hurried telephone calls to organise a visa.

"It should be right," said McDonald, who hoped to have the paperwork completed and sanctioned within 24 hours.

The premiership-winning jockey is hoping his efforts will be rewarded come Hong Kong's International race day in December.

A good performance by Spalato - unbeaten in six starts in Singapore - would put McDonald in the box seat to retain the mount in the Group One Hong Kong Sprint.

The jockey might have also found himself a stakes winner in the making at Canterbury.

McDonald won the TAB Rewards Plate aboard Hawkes Racing first starter Binary who is owned by prominent racing identity Alan Bell.

Bell also races Binary's unbeaten stablemate Deep Field who confirmed his rating as one of the most exciting horses in training with a stakes win at Flemington during the Melbourne Cup carnival.

Both horses race in Bell's colours of grey with red diagonal stripes and co-trainer Michael Hawkes is excited about Binary's prospects.

"Mentally, he's not there yet, he's probably another preparation away. But physically he's just magnificent," Hawkes said.

"To do what he's done today and beat a quality field - it's only his first start and he's done a few things wrong but he (McDonald) rode him perfectly.

"It's very pleasing and I know James will be happy because we've had a little bit of time for this horse and hopefully he can go somewhere."

Hawkes also said the stable was keen to land a Group One win with Deep Field in the autumn and confirmed the TJ Smith Stakes during The Championships was a likely target for the unbeaten sprinter.