2006, but has yet to be accepted by local authorities. The Shoreline Management Plan states that the stretch of coast will be protected for at least another 50 years, but that in the event of sea level rise and post-glacial lowering of land levels in the South East, there may a need for further research to inform future management decisions, including the possibility that the sea defences may have to be realigned to a more sustainable position. Natural England have contributed some research into the impacts on the environment of various realignment options. The draft report of their research was leaked to the press, who created great anxiety by reporting that Natural England plan to abandon a large section of the Norfolk Broads, villages and farmland to the sea to save the rest of the Norfolk coastline from the impact of any adverse climate change. Education Primary and secondary education Before 2011, Norfolk had a completely comprehensive state education or "maintained" system managed by Norfolk County Council, with secondary school age from 11 to 16 or in some schools with sixth forms, 18 years old. Since then,a number of schools formerly in the "maintained" system have left it to become academies, or members of academy groups. Others have become free schools. Both academies and free schools are still publicly funded by the Department of Education, but are not with County Council management. In many of the rural areas, there is no nearby sixth form and so sixth form colleges are found in larger towns. There are twelve private, or private schools, including Gresham's School in Holt in the north of the county, Thetford Grammar School in Thetford which is Britain's fifth oldest extant school, Langley School in Loddon, and several in the city of Norwich, including Norwich School and Norwich High School for Girls. The King's Lynn district has the largest school population. Norfolk is also home to Wymondham College, the UK's largest remaining state boarding school. Tertiary education The University of East Anglia is located on the outskirts of Norwich and Norwich University of the Arts is based in seven buildings in and around St George's Street in the city centre, next to the River Wensum. The City College Norwich and the College of West Anglia are colleges covering Norwich and King's Lynn as well as Norfolk as a whole. Easton & Otley College, west of Norwich, provides agriculture-based