In 1984, Barker moved with her husband, baritone Peter Coleman-Wright, to London, so that he could assume his new position as a member of the choir at the Glyndebourne Festival. Two weeks after their arrival, Barker auditioned for and was accepted as a member of the opera chorus at the Welsh National Opera. She stayed there for the next year and a half, occasionally substituting for ailing singers in larger parts and performing the occasional comprimario role in addition to singing in the chorus.