She played hockey, representing North Wales in competition, and participated in equestrian sports, from Pony Club tetrathlon in which she became team captain and latterly eventing (taking it up professionally from 2006 to 2008),[4][2] Deas was brought into skeleton in 2009 through UK Sport's "Girls4Gold" talent identification programme and was selected to UK national team the following year.

Deas finished fourth in her only Junior World Championships, in 2011 (her only year of eligibility) at Park City.

In March 2012, she joined the North American Cup circuit for two races at Lake Placid, both with podium finishes.

[9] Deas featured in the Olympic team for the first time in 2018 after finishing the World Cup season standings in seventh place, ahead of fellow Team GB skeletoner and defending Olympic champion Lizzy Yarnold.

[11] Deas competed for Great Britain again in the 2022 Winter Olympics and finished in 19th place, [12] a result that has since been attributed to inadequate equipment.