The Duke of Edinburgh’s life will be commemorated on Saturday at Windsor Castle’s St George’s Chapel. There was an outpouring of grief after the prince died last Friday aged 99.
Harry has returned to the UK and is currently self-isolating due to coronavirus rules.
Following medical advice Meghan, who is heavily pregnant, will remain in California.
The funeral will be the first time Harry sees many members of his family since last month’s incendiary Oprah Winfrey interview.
Speaking to the Herald Sun Katie Nicholl, Vanity Fair’s royal editor, said this “very short window of time” will make things more difficult for Harry’s relationship with the Queen.
She said: “I think it’s a really really tough position to be in.
“I know they are royals and we put them on a pedestal and we almost don’t see them as real people, but they are real people with real lives, real emotions and real feelings.
“They learn to control them, they know the cameras will be on them and I think they will be giving very little away on the day itself.
“But I think behind closed doors it will be a deeply emotional reunion.”
READ MORE: Queen to have final private moment with Prince Philip before funeral
Buckingham Palace released a statement on behalf of the Queen expressing sadness at Meghan’s unhappiness.
However it added “some recollections may vary” about the events discussed with Ms Winfrey.
Due to coronavirus restrictions only 30 mourners will be allowed into St George’s Chapel for the service.
The public are being urged to stay away to avoid spreading the virus though a national minute’s silence will be held at 3pm.
Prince Philip, who married the Queen in 1947, was the longest serving royal consort in British history.
Ahead of the funeral Prince Harry released an emotional tribute to his grandfather.
He said: “My grandfather was a man of service, honour and great humour.
“He was authentically himself, with a seriously sharp wit, and could hold the attention of any room due to his charm – and also because you never knew what he might say next.
“He will be remembered as the longest reigning consort to the Monarch, a decorated serviceman, a Prince and a Duke.
“But to me, like many of you who have lost a loved one or grandparent over the pain of this past year, he was my grandpa: master of the barbecue, legend of banter, and cheeky right ‘till the end.”