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A royal footman for Queen Elizabeth II has reportedly tested positive for COVID-19.

The Buckingham Palace employee contracted the coronavirus while the monarch was still at her main residence in London last week, before heading to Windsor Castle with husband Prince Philip, the Duke of Edinburgh, to begin their Easter break earlier than planned.

The footman, who is now in self-isolation, had been responsible for taking drinks and meals to the Queen, introducing guests, handling messages, and walking her beloved dogs, according to The Sun.

The unidentified staffer is the latest infected person to have come into contact with the Queen in recent weeks - her eldest son Prince Charles and British Prime Minister Boris Johnson both recently went public with their mild cases of the disease.

Royal representatives have not commented directly on the aide's reported illness, but confirmed to The Sun that the ruler, who turns 94 on 21 April, remains in good health.

The news emerges two days after the global coronavirus pandemic forced the cancellation of her annual birthday parade in London.

The Trooping the Colour event, typically held in early June, "will not go ahead in its traditional form," Buckingham Palace officials confirmed on Friday.

They added, "A number of other options are being considered, in line with relevant guidance."