It is well loved and used by residents as well as visitors to the Observatory, Old Royal Naval College and the Maritime Museum. Criterion (vi): Greenwich is associated with outstanding architectural and artistic achievements as well as with scientific endeavour of the highest quality through the development of navigation and astronomy at the Royal Observatory, leading to the establishment of the Greenwich Meridian and Greenwich Mean Time as world standards. The London Borough of Greenwich Unitary Development Plan (UDP) contains guidance to protect and promote the Maritime Greenwich World Heritage property which have been saved and will remain in place until the UDP is replaced by the emerging Local Development Framework (LDF). The Old Royal Naval College is in the freehold of Greenwich Hospital, which remains a Crown Naval charity. The Royal Courts are leased to Greenwich University and Trinity Laban Conservatoire of Music and Dance to form the Maritime Greenwich University Campus.