At the midnight ceremony which saw the country officially become a republic, the Prince told a crowd he would always consider himself a “friend of Barbados” in a magnanimous speech in which he emphasised the country’s continued ties with the Commonwealth.

He accepted the Order of the Freedom of Barbados, swapping his usual duties of conferring honours on others at home in Britain for standing one step below Dame Sandra, as she honoured him.

From a stage, he watched in silence as the Royal Standard was lowered, folded, rolled and wrapped, before being put away for good and replaced by the presidential flag.

On Sunday night, he stepped out of the RAF Voyager onto the tarmac as Prince of the realm, greeted with the national anthems of Barbados and the UK.

When he ascends the stairs to fly home again on Tuesday night, God Save the Queen will ring out first, in honour of his new position as a visiting guest from the British monarchy.

Henceforth, the Royal Salute – played for the final time ahead of Dame Sandra’s inauguration – will be replaced by a Presidential Salute, with the military presenting new colours stripped of the Crown and Royal Cipher.

Prisoners on the island will no longer be detained at “Her Majesty’s Pleasure”, politicians will swear an Oath of Barbados, and nobody will formally pledge allegiance to the Queen.

Prince shown slavery documents during tour of National Archives

The Prince has viewed documents relating to slavery in Barbados, as he was taken on a tour of the National Archives. He was shown documents relating to emancipations, as well as the records of the early settlers in the 1600s.

Wearing a mask and appearing deeply interested in the material, he was given a 30 minute tour of the carefully-maintained archives, hearing how staff are working to digitise thousands upon thousands of records to preserve them for future generations and allow more people to access them.

Among the displays were several photographs of previous Royal visits, including a young Prince of Wales himself.

A series of newspapers showed the rapturous reception that awaited the Queen and Duke of Edinburgh during a visit in 1960s, with headlines including “Riotous Welcome For the Queen”, “All Hail our Live-Wire Sovereign” and “Royal Couple Shows Interest in Sugar”.

He was also shown documents relating to his own family, including the paperwork declaring his mother as the Queen of Barbados in 1967.