Chalk Stream is the first horse owned by a member of the Royal Family to win a stakes race in this country after his success in the Listed Australia Day Cup last week.

Warwick Farm, situated in the south-western suburbs of Sydney, doesn't compare to the salubrious surrounds of England's famous Royal Ascot racecourse but King Charles got a "real thrill" out of Chalk Stream's win, his racing manager Johnny Warren revealed.

"You can't underestimate the tremendous feat of winning a race like the Australia Day Cup and a lovely trophy to take back to The King," Warren said.

"It has been a worthy effort to get the horse here and to win a lovely race on a prestigious raceday was wonderful.

"The King was absolutely delighted with the win, he was over the moon when I rang him."

Warren agreed Chalk Stream's big-race win could lead to more of the King's horses racing in Australia.

"I really do feel Australian racing should be the envy of the world," Warren said. "It is all-embracing, it is such a good sport to connect everyone.

"Your country racing is tremendous but when you have racing in the middle of the city where so many people can compete and access racing on a consistent basis, they can get to know the horses, the trainers, the riders, the whole thing and it starts to build this momentum of participation.

"Now the King has tasted the thrill and excitement of having a lovely winner in Australia, I'm sure if he gets the right horse he will be keen to do it again."

Warren, who is returning to England this weekend after attending the Magic Millions Yearling Sale on the Gold Coast earlier this month, said Australian racing is enjoying boom times with soaring prizemoney and a vibrant breeding industry.

"Your breeders here are the most sophisticated in the world because they are so open-minded about bloodstock abroad," Warren said.

"Other countries might get caught up in their own bloodlines but Australians follow racing outside their own back door and it is paying off in spades."

Chalk Stream was so dominant in his Australia Day Cup win the stayer is likely to be aimed at the Group 1 Sydney Cup at Royal Randwick during The Championships in April.

"In the brilliant, capable hands of Chris Waller and his team, I'm sure Chalk Stream is just now coming of age," Warren said.

"The horse has had to have some specific barrier training. Chris Waller has done a tremendous job and we have been getting videos to the King showing how the horse has been re-trained to accept the starting stalls.

"The King has been absolutely fascinated by the journey, the complexities that a thoroughbred takes us through."

King Charles inherited Chalk Stream and a number of the other racehorses formerly owned by Queen Elizabeth II after her passing last September.

The Queen had sent former English stayer Chalk Stream to be trained by Waller more than 12 months ago believing the stayer would be suited by Australian racing.

"The Queen was always fascinated by different styles of training and the reason we had the odd horse in Australia was to get the feedback on how the horses were trained differently, the different riding and racing circuits. It was another form of information for her," he said.

"I'm sure the King will be just like the Queen and be a big sponge for information."

The King was once a reluctant racegoer and Warren revealed he tried many years ago to persuade His Majesty to become more involved in racing.

"The King hasn't necessarily followed racing overtly closely over the years because it was the Queen's thing not his," Warren said. "I remember he said until you have your own garden you don't realise how much tendering a garden needs.

"Once you have your own garden you have to effectively weed it and plant it and prune it and do all the things you have to do with gardens.

"He has been very, very true to his word. From about six weeks after the Queen passed and once he had the chance to get his head around it he has been fascinated by the breeding side."

Warren said the King and the Queen's Consort, Camilla, are enjoying their racing with some "jolly nice winners" already and a strong portfolio of bloodstock in England this year.

"The Queen Consort really enjoys her racing and it is tremendous that the bloodstock industry has Royal participation that is going to embrace the sport again," Warren said.