 The school became co-educational in 1978, and has a current enrolment of around 1150 students.Westminster School was born out of a perceived need by the Methodist Church in South Australia for a day and boarding school in Adelaide to accommodate demand additional to that satisfied by the long-established Methodist-based school Prince Alfred College.Planning for Westminster began with a meeting on 7 June 1957, although at that stage it was not known where or when the school would be built, or indeed what it would be named.