King Charles

Dr Nathan Ross, a former deputy high commissioner to Papua New Guinea, will act as an assistant private secretary to the new King, the Daily Mail has reported.

According to Ross' LinkedIn profile he joined the Private Secretary's office last month.

The office acts as the primary source of advice to the King for constitutional, governmental and political affairs, and Ross will be advising King Charles about sustainability.

Ross was formerly with the Ministry of Foreign Affairs and Trade, where he joined as a climate change specialist.

The King will be formally crowned in a splendid array of tradition and ceremony on Saturday night New Zealand time.

But amidst all the pageantry, the British Empire has a problematic past.

Vanuatu-based journalist Dan McGarry said the past has not been forgotten, but the level of impact is different in the various parts of the Blue Continent.

"I think you'll find a range of opinion and a range of enthusiasm," McGarry told RNZ Pacific.

The formal coronation ceremony for Charles, who became king on the death of his mother Queen Elizabeth last September, will take place at Westminster Abbey on 6 May (local time).

The following day attention turns to Windsor Castle, west of London, where 20,000 members of the public and special guests attend the concert, which will also be broadcast on television and radio.

US music star Richie said: "To share the stage with the other performers at the Coronation Concert is a once-in-a-lifetime event and it will be an honour and a celebration."

The concert will be broadcast on the BBC on 7 May featuring "global music icons", orchestras and a diverse "coronation choir".

BBC reports it will come the day after the coronation at Westminster Abbey.

Processions to and from the abbey will take place, ending with a balcony appearance at Buckingham Palace.

These are among the new details just released on plans for the weekend which the King and Queen Consort hope will be an opportunity for friends, families and communities to celebrate together, said Buckingham Palace.