Prince Philip, who died on Friday aged 99, will be remembered in a service at St George’s Chapel in the grounds of Windsor Castle on Saturday.
The televised event will be carried out in line with Covid restrictions but there will be a military presence with personnel from the Royal Navy, Royal Marines, Army and RAF.
Buckingham Palace said the plans “very much” reflected the duke’s wishes.
Members of the public have been asked to stay away from the castle, with the ceremony to take place behind its walls, and an online book of condolence has been opened.
On Tuesday, the Queen carried out her first official duties since the death of her husband.
Meanwhile, the Princess Royal reminisced about sailing in her younger years as she made her first in-person appearance at an official event since her father’s death.
Anne appeared in good spirits as she met with members of the Royal Yacht Squadron (RYS) on the Isle of Wight on Wednesday – a club Prince Philip was once admiral of.
In an Instagram message, Princess Eugenie paid tribute to her “dearest Grandpa”, pledging to look after “Granny”, the Queen, for him.
Prince Philip is reported to have requested minimal fuss but his ceremonial royal funeral will have personal touches.
His coffin, which is lying at rest in the private chapel at Windsor Castle, will be carried the short distance to the separate St George’s Chapel using a modified Land Rover that the duke helped to design.
It will be draped with his personal flag, which reflects his Greek heritage and his British titles, and his naval cap and sword will be laid on top of it.
The armed forces were important to the duke, who served in the Royal Navy, and they will play a part in his funeral, with military top brass present.
Servicemen and women have been carrying out rehearsals at the Army Training Centre Pirbright in Woking, Surrey.