[4] She also completed the triple with the England girls' team, taking the overall title on both occasions; and she also won the pairs in 2012 with Josie Patterson, and in 2013 with Natasha Eaves.
In october 2013 came her biggest two wins in youth events when she won the WDF World Cup Girls Singles defeating Tiarna Smith in the final, she then won the Winmau World Masters Girls title by beating Kayleigh O'Neill 4-0 in the final.
She faced the Current World Number 1 Lorraine Winstanley who she defeated 4-0 to progress to the Semi Finals.
On the BDO tour, Casey had a fairly quiet season with best results being Quarter Final runs in the Slovak Masters, Isle of Man Classic, England Open and Helvetia Opens, this was enough to qualify for the BDO World Championships where she suffered a first round defeat to Lorraine Winstanley.
Casey also won the Isle of Man Ladies Pairs title for the 3rd year in a row alongside partner Fallon Sherrock.