Prince Harry poses for a photograph.

The UK's Prince Harry has arrived back in Britain for his grandfather, Prince Philip, funeral on Saturday.

Harry, whose explosive interview alongside his wife Meghan plunged the royal family into its biggest crisis in decades, will quarantine in accordance with coronavirus guidelines so that he can attend the ceremonial funeral at Windsor Castle.

Philip, the husband of Britain's Queen Elizabeth who had been at her side throughout her 69-year reign, died at Windsor Castle on Friday.

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The Prince was seen arriving onboard a British Airways flight from Los Angeles which arrived at Heathrow at 1.15 p.m. on Sunday, dpa news agency quoted The Sun newspaper as saying ina report.

Harry, Philip's grandson, arrived in London on Sunday from Los Angeles on a British Airways flight, "The Sun" newspaper reported. Buckingham Palace said Meghan, who is pregnant, will not attend on the advice of her doctor.

Prince Philip died at Windsor Castle on Friday. File photo

Harry, sixth in line to the throne, will quarantine in accordance with coronavirus guidelines so that he can attend the ceremonial funeral at Windsor Castle.

Members of the public have been urged not to attend the funeral by police and the British government due to the restrictions.

Prime Minister Boris Johnson has announced that he would give up his space at the funeral so that another family member would be able to attend.

Interviewed by Oprah Winfrey last month, Meghan said her pleas for help while she felt suicidal were ignored and that an unnamed member of the family had asked how dark their unborn child's skin might be.

Harry also bemoaned his family’s reaction to their decision to step back from official duties and move to Los Angeles.

In response, Queen Elizabeth said the royals were saddened by the challenging experiences of her grandson and Meghan and promised to privately address revelations about a racist remark about their son.