was named in his honour. The school marked its 120th year in 2005. At the same time, Phillip Heath celebrated his 10-year anniversary as the Head of School. This year also saw the School Council confirm the decision to vacate the Leadership and Enterprise Centre at 495 Kent Street. The main campus remains within the eight-storey St Andrew's House, located at 474 Kent Street. On 22 September 2006, a new entrance to the school was opened by former Archbishop of Sydney, Sir Marcus Loane . This was attended by the Lord Mayor of Sydney, Clover Moore, as well as many parents and friends of students. The contemporary entrance is directly opposite the west door to St Andrew's Cathedral in Sydney Square. The school's address subsequently changed from 474 Kent Street, Sydney to Sydney Square, Sydney. In 2008, the school successfully negotiated a lease with the Wentworth Park Stadium Trust to allow the School to use the Wentworth Park sporting fields and stadium. The lease also includes the exclusive use of a three-storey building on the eastern side of the field and change rooms on the western side. These lease arrangements are ongoing. On 20 November 2008, it was announced that the Head of School, Phillip Heath, after 14 years in the position, would depart the school to take up the principalship of Radford College, Canberra, effective from 1 July 2009. Dr John Collier, Head of St Paul's Grammar School for 12 years, was announced as his replacement on 4 June 2009, and commenced the position in Term 1, 2010. Co-education In Term 1, 1999 the school introduced the first girls into the senior college, and 76 girls entered into Years 10, 11 and 12. During the 2006 Speech Night, the school revealed a plan to introduce full co-educational years from Kindergarten through to Year 12 in 2008. In 2006, the youngest female student was enrolled in Year 8, and graduated with the Class of 2010. During 2007, 10 girls were enrolled into the middle school (Years 7 to 9) and the school introduced twin classes (single-sex classes) in those years for the key subjects of English, Mathematics and Science. All other subjects, including sport, and in all other years of the school, are taught in a co-educational environment. St Andrew's was the first independent school in New South Wales to choose this twinning model in a coeducation environment. Visits by