Beth joined the club in January 2017, bringing an end to her association with Sunderland, which had lasted since 2011.
Joining at 21 years of age, Beth had already scored 77 goals in 78 appearances for her former club prior to her arrival in north London.
Beth has years of experience at international level as she has represented England since she was 15 years old.
She also represented England in the 2014 FIFA U20 Women's World Cup where she scored a long-range goal against Mexico.
Beth is yet to be capped for the senior England team but will hope to continue her development under the guidance of Pedro Martinez Losa.