 As the constitution of the order of the Christian Brothers forbade them to teach girls, they were unable to stay.In that year St Joseph's re-merged with Layton Hill Convent to form St Mary's Catholic College.Meanwhile, Layton Hill Convent had been flourishing as the principal Catholic girls' grammar school in the Fylde and it was its Head Teacher since 1966, Sister Maureen Grimley (SHCJ) (1932–2007), who became the first Head Teacher of the re-combined school.