The multiple championship victor has been signed as a development driver for the Williams team, and she hopes to make it into Formula One.
Chadwick, Powell and Emma Kimilainen circulated at the front for the first 10 minutes, in close formation but in line astern through the twists, turns and undulations of the renowned Kentish racetrack. "The pressure just got to me a little bit".
Ahead of Sunday's season finale, Chadwick enjoyed a 13-point lead over title challenger Beitske Visser, but the 21-year-old launched her race from pole while her Dutch opponent lined up fifth. She managed it, taking the final podium position with just three laps to go.
"Obviously, each race has got bigger and better but coming here to Brands Hatch, my home circuit, well, I've simply never experienced anything like it".
Oxfordshire-born Alice Powell took her first win in the W Series, having pressured her way past Chadwick from second on the grid.
She said the money would help fund the next stage of her career, wherever that might be, and would make a "massive, massive difference". "F1 is the dream of every young driver", she says.Earlier this year Chadwick was taken on by the Williams F1 team as part of their junior driver programme, which she says is the first proper step in fulfilling her ambition. "I would have liked to have dominated, but it means that I've had some good racing this year, which is ultimately what they are out to achieve".
Finishing in the top 12 for the overall championship is significant, as those drivers receive an automatic invitation to return for the 2020 W Series competition.
"I've never felt attention from the spectators as much as I did today, and that really is a credit to W Series".
"I think we've done that now and next year has got to be all about the drivers and telling the drivers' stories and introducing the personalities and characters". Powell was third overall on 76.
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