Conor Swail and Casturano placed 2nd; Canada's Tiffany Foster challenged the Irishmen aboard Electrique to grab 3rd.
The Canadian piloted the 13-year-old stallion Light My Fire – formerly a show jumper – to win the $25,000 class at Thunderbird Show Park.
Thursday was a good day for the Canadian, who rode two of her own horses into first place in FEI classes, including a sought-after 4* win.
When a cyst in his stifle and subsequent surgery threatened to sideline him forever, the Dutch Warmblood gelding had other plans.
Picking up where he left off last week, the Irish rider kicked off the Odlum Brown BC Open with a win aboard Ariel Grange's aptly-named Incredible.
There was lots of action at the Canadian Premier at Thunderbird Show Park, culminating in the young Brit scoring the biggest win of his career.
Action in the Canadian Premiere is underway at Thunderbird Show Park, and Foster got things started on the right foot with her new ride.
Recovered from an injury that seemed like a career-ender, Ariel Grange’s 15-year-old gelding is back in fighting form and better than ever.
At the tender age of four she helped her mom select her future competition horse; now she and 'Rosie' are rocking the hunter rings.
The Albertan and her 16-year-old Canadian warmblood gelding, who has not had a rail in two weeks of competition, are racking up the wins.