 In 1923 Archbishop Frederick Keating (Liverpool had become an Archdiocese in 1911) invited the Irish Christian Brothers in Liverpool to take over the running of St Joseph's and they did so.In November 1924, Blackpool was transferred into the new Roman Catholic Diocese of Lancaster.The brothers remained in charge at St Joseph's until their enforced departure in 1975 when a new Lancaster Diocesan rule required all Catholic schools to become co-educational.