The trustees of Dorneywood are appointed as follows:
One trustee is nominated by the Prime Minister, being a person holding Cabinet or ministerial rank. One trustee is appointed by the Council of the National Trust. One trustee is appointed by a resolution of the trustees on the recommendation of the Prime Minister. Fourthly an additional trustee may be appointed by the other trustees.
The three non-ministerial trustees are appointed for a period of five years, renewable for a further period of five years, subject to the agreement of all the trustees.