The King, who is head of the Commonwealth, is due to formally open the Commonwealth Heads of Government Meeting.

Britain's King Charles and Queen Camilla flew into Samoa late on Wednesday, for a visit during which the monarch will be offered the title of high chief and attend a summit of Commonwealth nations, following a six-day tour of Australia.

The monarch will attend the Commonwealth Heads of Government Meeting, where climate change will feature heavily, but Britain won't raise the issue of reparations for the empire's historic slavery practice.