In July 1986, the Isles of Scilly Environmental Trust was formed as a registered charity. On July 1 2001, the Trust became officially affiliated to the national organization of Wildlife Trusts and has thus become the Isles of Scilly Wildlife Trust - the 47th in the UK.
The Trust is responsible for the management of all the land that is leased to it by the Duchy of Cornwall on the inhabited islands, in addition to all the uninhabited islands, islets and rocks.