The extraordinary lengths to keep the Queen safe during her speech

Extraordinary measures were put in place to protect the Queen as she filmed her coronavirus address which aired at 5am on Monday morning AEST.

Queen Elizabeth, 93, is in self-isolation with Prince Philip, 98, at Windsor Castle. Her Majesty appeared to be in good health as she spoke of what have been trying times.

Specific measures were put in place to protect the Queen during filming.

Advice was sought from Her Majesty's personal doctors on the measures that needed to be taken to reduce the risk of infection during filming.

The White Drawing Room at Windsor Castle in which filming took place was chosen for it's size so appropriate distance could be maintain between Her Majesty and the cameraman.

The White Drawing Room is typically used for special occasions including to take photos following royal weddings, including the wedding of the Duke and Duchess of Sussex in 2018.

For the Queen's address, the cameraman was dressed head-to-tow in PPE (personal protective gear).

Additional staff supervising filming were located in a separate room and connected to the Queen and cameraman via speakers.

The UK has been hit particularly hard by COVID-19. As of April 4, 41,903 have tested positive for the disease and 4,313 have died.

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Prince Charles tested positive for coronavirus and has since recovered and is said to be in good health once more.

During the speech, the Queen spoke of what has been an "increasingly challenging time".

"I hope in the years to come everyone will be able to take pride in how they responded to this challenge," she said.

"And those who come after us will say that the Britons of this generation were as strong as any. That the attributes of self-discipline, of quiet good-humoured resolve and of fellow-feeling still characterise this country."