In winning the first ever all-women's championship, Chadwick netted $500,000 in prize money but there is surely a bigger end goal for arguably the most talented female driver in motorsport.
The multiple championship victor has been signed as a development driver for the Williams team, and she hopes to make it into Formula One.
"At the moment I'm more excited than anything else". For Chadwick, though, this is just a step towards her ultimate goal. First, she needed to take care of business in a Formula Three auto, by winning a contest that she had led ever since the first instalment at Hockenheim three months ago. As Powell led the field into Clearways and the safety auto peeled into the pit lane with six minutes remaining in the 30-minute race, she cleverly bunched up the field then nailed it onto the straight, establishing a lead over Kimilainen that she would never lose. "Whether that's personal or through sponsors or a team, none of them have paid their way scraping the barrel", she said.
Having picked up victories in Hockenheim and Misano earlier in the six-race series - and finishing on the podium at every other event before her home race in Kent - 21-year-old Chadwick was the pick of the field in the historic all-women's championship.
Brands Hatch is fond and familiar territory, the southern circuit where past year she became the first female driver to win a round of the British Formula Three championship.
"I was relatively unknown coming into the season and now I think the leg up it has given me has been huge".
'I'm relieved. It feels unbelievable to win the championship. Next year will also see drivers eligible to score FIA Super Licence points, which are vital in order to become a Formula One driver.
W Series Chief Executive Catherine Bond Muir has promised extra European rounds for 2020, with the series looking to expand further across the globe in the following years.
W Series founder Catherine Bond Muir hoped to add at least two races to the calendar next year, probably in Europe before a possible inter-continental expansion into the United States and Asia in 2021.
The series met some criticism when it was first announced, with some prominent female racing drivers opposed to any segregation on track.
That put Visser on Chadwick's tail and the Dutchwoman overtook her with three minutes left after a breathtaking passage of wheel-to-wheel action during which the pair made contact. 'I can't really take it all in.
"I want to do as much as I can.my overall aspirations are much greater than just this, than the W Series", she said. At turn two, Chadwick uncharacteristically dropped to third as Powell slipped through the gap to take the lead and Kimilainen followed into second.