*Club domestic league appearances and goals, correct as of 02:00, 23 December 2023 (UTC) ‡ National team caps and goals, correct as of 02:00, 23 December 2023 (UTC)
Mason began her career in Watford's youth teams. After moving on to Chelsea, she appeared 23 times for the club's development team, scoring six goals.[3] Nineteen-year-old Mason returned to Watford in April 2015, after four years with Chelsea.[4] In 2015, she was Watford's top-goalscorer with five goals and won the club's Goal of the Season award for a strike against Aston Villa.[5] She scored three goals in 14 appearances in the 2016 season, then signed for Millwall Lionesses in February 2017.[6]
At Yeovil Town Mason converted to playing as a defender,[9] but the club finished a distant last in the 2018–19 FA WSL after a series of hurtful on-field drubbings and a 10-point penalty imposed for insolvency. Yeovil were then kicked out of the top two Leagues when The FA rejected their purported business plan.[10]
Mason was with Lewes as they joined the last eight clubs in the Women's FA Cup. During a match against Chelsea she scored for goals. Mason signed a two-year contract with Birmingham City Women in July 2023.[13]
International career
Mason was eligible to represent England, Gibraltar and Northern Ireland at international level.[14] She received her first international callup for Gibraltar in February 2022.[15] In August 2022, she was called up to the Northern Ireland after switching her international allegiance from Gibraltar.[16]