Counsellors of State. In: www.royal.uk. Abgerufen am 22. April 2021 (englisch): „Counsellors of State are appointed from among the following: The Duke of Edinburgh and the four adults next in succession (provided they have reached the age of 21). The current Counsellors of State are These are currently The Prince of Wales, The Duke of Cambridge, Prince Harry and The Duke of York.“