 In 1922, the lease passed to Arthur Dorrien-Smith, who agreed to pass several properties on Tresco, including the castle, into the guardianship of the Ministry of Works.In the 21st century, the castle is controlled by English Heritage, as the successor to the Ministry of Works, and open to visitors.The interior wooden floors have been lost, but the spiral staircase and the stone, vaulted roof remain intact and accessible.