Granddaughter of Mr Easterby, Joanna is one of the country's top amateur riders. She shared the Lady Amateur Riders championship with Serena Brotherton in 2015, both having six wins. Three of her winners were aboard Tapis Libre.
In 2017 Jo won the prestigious Queen Mother's Cup at York on Tapis Libre, trained by her cousin Jacqueline Coward. The following month the same partnership won the Ladies' Derby at Epsom for the second consecutive year.
You can follow Joanna Mason on Twitter by clicking the logo.