It was here that she was registered as the first professional female footballer in England. She joined Birmingham City before the 2004–05 season, and then, after being released from Birmingham, rejoined Arsenal for the 2005–06 season after a short spell with the New Jersey Wildcats of the W-League in the United States. Yankey, along with England teammate Rachel Unitt, played for the Wildcats for the last seven games of the season, and helped them win the W-League championship. In 2011, she helped Arsenal to another domestic treble.