Parker recorded the winning time of 1hr 14min 53sec in the PTWC women's race, contested over a 750 metre swim, six-lap cycle and two-lap run.

She finished in front of compatriot Emily Tapp in 1:18:31, while Margret Ijdema of The Netherlands was third in 1:20:35.

With the female PTWC class making its Paralympic debut at Tokyo 2020, Parker is aiming to be on top of the podium this summer. 

"The goal is a gold medal in Tokyo and I am on track," she said. 

In the PTS2 women’s race, Yukako Hata of Japan claimed victory in 1:29:47, followed by Melissa Stockwell of the United States in 1:33:00 and Rakel Mateo Uriate of Spain in 1:45:33.

Austria’s Florian Brungraber was the gold medallist in the men's PTWC race, having dominated the two lap-run. 

He crossed the line in 1:08:34, a clear distance in front of Jumpei Kimura of Japan in 1:10:14.

Home favourite Nic Beveridge was the bronze medallist in 1:10:26. 

In the PTS2 class, Frenchman Jules Ribstein continued his winning streak from 2019, which included world and European titles. 

He dominated proceedings in 1:11:03, with Russia taking silver and bronze. 

Vasili Egorov was second in 1:14:45, while compatriot Mikhail Astashov came third in 1:16:10.