For a small-time country stable, securing a high-profile jockey is considered a genuine coup.

Getting the rider's services for a second time can be a minor miracle.

That's why Scone trainer John Ramsey rates Kerrin McEvoy's decision to ride Unknown Destiny at Warwick Farm as a strong pointer to the mare's chances of winning for the first time in 18 months.

"Sometimes the Sydney jockeys jump off the bush horses and go with the city trainers," Ramsey said.

"But obviously he thought she showed enough to stick, so that's a positive."

McEvoy rode Unknown Destiny for the first time in a narrow defeat at Rosehill last month and horse and jockey team up in the Cafe Culture Insitu Handicap (1300m) on Wednesday.

Ramsey keeps limited numbers in work after taking over the day-to-day running of his family's Turangga Farm in the heart of thoroughbred country in the NSW Hunter Valley.

Chris Waller will unveil a new stable addition to city racegoers at the meeting, but it won't be a racehorse.

Irish apprentice Patrick O'Donnell has just started a summer stint with the Waller yard.

"It's the off-season back home and it's a great opportunity," O'Donnell said.

The 20-year-old has ridden 30 winners in the United Kingdom under guidance of his master, the Group One-winning trainer Ralph Beckett.

Claiming 2kg on city, provincial and country racetracks, O'Donnell had his introduction to Australian racing with two rides at Hawkesbury on Saturday and has two Warwick Farm mounts - both for Waller.

Both horses are double-figure chances with the stayer No Return rated his best prospect of landing a first Australian winner in the Schweppes Handicap (2200m).

Two prominent members of the Gai Waterhouse stable will figure in an exhibition gallop at the midweek meeting.

English and Flamboyant Lass will work together over 1200m after the first race.

After finishing runner-up to Vancouver in the Golden Slipper, English missed the spring while Flamboyant Lass hasn't been seen at the races since a close fifth in the Flight Stakes in October.