Arsenal Ladies sealed a fourth straight league title with a 5-1 win at Chelsea on Tuesday.
Yankey scored Arsenal's second goal at Chelsea
Lianne Sanderson and Katie Chapman both scored goals in either half and Rachel Yankey also netted to secure Arsenal's third trophy of the season.
The Gunners also won the FA Premier League Cup and the London County Cup.
Arsneal Ladies will take a 1-0 lead into the second leg of the Uefa Women's Cup final against Umea IK at Boreham Wood on Sunday.