The Portsmouth Naval Base Property Trust has long sought to extend the area of the Historic Dockyard to cover Dry Docks 4 and 5 and the historic Block Mills building among others. In 2015 an architectural design competition for the project was won by Latz+Partner; however the Ministry of Defence subsequently indicated that property to the north of the Mary Rose will not be ceded for several years at least, due to the site's proximity to the proposed berth of the new Queen Elizabeth-class aircraft carriers.