Harding began her career at Cardiff City and made her first team debut in January 2007, during a 4–0 Welsh Women's Cup quarter final win over Newport Strikers.

[10] Reading Women snapped up the Welsh international on a free transfer in January 2018[11] Since joining the Royals in 2018, Harding has been named captain.

[15] Harding scored her first goals for Wales on 20 June 2012 in a UEFA Qualifying match against Israel at the Racecourse Ground in Wrexham.

[16] As a student at UWIC, Harding was called–up to represent Great Britain at the 2011 World University Games in Shenzhen, China.

[18] In November 2024, BBC News reported allegations against Harding (now using her married name of Allen-Wyatt), of taking payments for undelivered football coaching, unpaid loans and unfulfilled sponsorship deals.