Weight relief was a huge assistance to a horse's chances on winter tracks, she said.
"It's also an acknowledgement of the work she does at the track. It's recognition of her effort, for which I am very grateful," she said. "Riders can be a bit scarce."
Ansell, 21, had her first raceday ride at New Plymouth. She was apprenticed to Levin trainer Illone Kelly and had a host of trial rides under her belt.
"I'm very excited. It's an honour to be riding Dr Watson," she said. "I like my chances, as long as I ride correctly."
Ansell grew up in Cambridge and had always had a keen interest in horses. She was introduced to racing by a friend, while her grandfather was a keen follower of horses and suggested she become a jockey.
"Racing is so rewarding. The horses are such majestic animals and the fact that they reach such high speeds, they're just amazing. All the people I have met so far have been so welcoming," she said.