Her appointment was contained in a statement by Ben Maloney, Communications Officer, Commonwealth Secretariat, revealing that the High-Level Group would make recommendations on governance of the Commonwealth Secretariat.
The Commonwealth, however, denied that the group was constituted to secretly begin considering who might succeed the Queen as its head.
“At their last Summit in Malta, Commonwealth Heads of Government directed the Secretary-General to form the Group,” the statement read.
“Today members are discussing the scope of the group’s work and the areas of governance it will examine over the coming months.
“The process is open and the High-Level Group reports to the heads.
“The issue of succession of the Head of the Commonwealth is not part of the Group’s mandate.”
The statement said the group will be chaired by Anote Tong, former President of Kiribati (2003 to 2016).
Other members of the seven-member group includes Lord Howell, former British Energy Secretary; Louise Frechette, former UN Deputy Secretary-General; and Robert Hill, former Australian Defence Minister.
Dame Miller, former Deputy Prime Minister of Barbados and Dr George Vella, former Foreign Minister of Malta are also members of the group.
The group operates independently of the London-based Commonwealth Secretariat and would report only to the heads of Commonwealth governments. However, further members may be appointed.